field trial plan: tatd system trials at cfmetr, november 2015and further develop the tatd system, by...

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Defence Research and Development Canada Reference Document DRDC-RDDC-2017-D150 January 2018

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Field Trial Plan: TATD System Trials at CFMETR, November 2015

Garfield R. Mellema DRDC – Atlantic Research Centre

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Template in use: Normal.dotm © Her Majesty the Queen in Right of Canada (Department of National Defence), 2018

© Sa Majesté la Reine en droit du Canada (Ministère de la Défense nationale), 2018

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IMPORTANT INFORMATIVE STATEMENTS

Disclaimer: Her Majesty the Queen in right of Canada, as represented by the Minister of National Defence ("Canada"), makes no representations or warranties, express or implied, of any kind whatsoever, and assumes no liability for the accuracy, reliability, completeness, currency or usefulness of any information, product, process or material included in this document. Nothing in this document should be interpreted as an endorsement for the specific use of any tool, technique or process examined in it. Any reliance on, or use of, any information, product, process or material included in this document is at the sole risk of the person so using it or relying on it. Canada does not assume any liability in respect of any damages or losses arising out of or in.

This document was reviewed for Controlled Goods by Defence Research and Development Canada (DRDC) using the Schedule to the Defence Production Act.

Endorsement statement: This publication has been published by the Editorial Office of Defence Research and Development Canada, an agency of the Department of National Defence of Canada. Inquiries can be sent to: [email protected].

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DRDC-RDDC-2017-D150 i

Abstract

The Towed Active Torpedo Detection (TATD) system is a high frequency active sonar system comprised

of a towed directional source and a towed array receiver, as well as equipment on the towing vessel to

operate the source and process the received signals. The purpose of this system is concept evaluation and

development for the Torpedo Defence project.

This field trial is the first opportunity to validate and evaluate the operation of the newly developed

directional source, TOwed MultiChannel Acoustic Transmitter (TOMCAT), and the newly reconfigured

High Frequency Towed Array (HFTA). The system is to be tested against a towed passive acoustic target,

also recently developed for this activity. Data from this trial will to be used to refine the system concepts

and further develop the TATD system, by validating the operation of the source and receiver, and

advancing the signal processing aspects of this system.

This trial is to be held at the CFMETR 3D tracking range in November 2015, using two of their ships,

CFAV STIKINE (613) and CFAV SIKANNI (611).

ii DRDC-RDDC-2017-D150

Résumé

Le système remorqué de détection active des torpilles (TATD) est constitué d’un sonar actif haute

fréquence comportant une source directionnelle et un récepteur de réseau remorqués, ainsi qu'un

équipement sur le navire remorqueur pour exploiter la source et traiter les signaux reçus. Ce système a

pour objet l’élaboration et l’évaluation de concepts dans le cadre du projet de défense antitorpille.

Les essais en conditions réelles constituent la première occasion d’évaluer et de valider l’exploitation de

la source directionnelle récemment mise au point, de l'émetteur acoustique multicanaux remorqué

(TOMCAT) et du réseau haute fréquence remorqué (HFTA) nouvellement reconfiguré. Le système doit

être vérifié par rapport à une cible acoustique passive remorquée, elle aussi élaborée il n’y a pas

longtemps pour cette activité. Les données de ces essais serviront à affiner les concepts du système TATD

et à le perfectionner davantage en validant l’exploitation de la source et du récepteur et en progressant

dans le traitement des signaux.

Ces essais devaient être tenus au champ de tir 3D du CEEMFC, en novembre 2015, au moyen de deux de

leurs navires, le NAFC STIKINE (613) et le NAFC SIKANNI (611).

DRDC-RDDC-2017-D150 iii

Table of contents

Abstract . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i

Résumé . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii

Table of contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

List of figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv

List of tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v

1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2 Organizations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

3 Objectives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

4 CAF Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

5 Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

6 Experiments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

7 Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

8 Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

9 Proceedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

10 Records and Reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

11 Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

12 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

13 Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

14 Weather . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

15 Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

16 Personnel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

17 Signatures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

17.1 Distribution List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

17.1.1 DRDC – Atlantic Research Centre internal: . . . . . . . . . . . . . . . . 7

17.1.2 External: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Annex A TOMCAT— TOwed MultiChannel Acoustic Transmitter . . . . . . . . . . . . . 8

Annex B HFTA—High Frequency Towed Array . . . . . . . . . . . . . . . . . . . 10

Annex C Sharko—Towed Acoustic Target . . . . . . . . . . . . . . . . . . . . . 11

Annex D Equipment Packages . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Annex E Equipment Operation . . . . . . . . . . . . . . . . . . . . . . . . . 14

Annex F Environmental Assessment Requirements Decision Checklist . . . . . . . . . . 15

iv DRDC-RDDC-2017-D150

List of figures

Figure A.1: Isometric drawing of TOMCAT. . . . . . . . . . . . . . . . . . . . . . . . 8

Figure A.2: Isometric drawing of TOMCAT. . . . . . . . . . . . . . . . . . . . . . . . 9

Figure C.1: The Sharko towed target. . . . . . . . . . . . . . . . . . . . . . . . . . 11

DRDC-RDDC-2017-D150 v

List of tables

Table 1: The approximate field trial schedule for November 2015. . . . . . . . . . . . . . 3

vi DRDC-RDDC-2017-D150

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DRDC-RDDC-2017-D150 1

1 Overview

Chief Scientist (DRDC): Garfield Mellema, Torpedo Defence/Maritime Asset Protection

902- 407-0527, [email protected]

Project: DRDC Project 01CC: Torpedoes and Torpedo Defence

Field Trial Dates: 23–27 November 2015

Field Trial Ships: CFAV STIKINE, CFAV SIKANNI

Field Trial Location: CFMETR

A specific assessment of the utility of HF sonars for torpedo detection and tracking in the vicinity of a

ship was planned under the DRDC Torpedo Defence project.

The sea trial will begin with an engineering trial of the newly built TOwed MultiChannel Acoustic

Transmitter (TOMCAT) and the newly reconfigured High Frequency Towed Array (HFTA)1. Having

validated these components, the trial will continue with system-level tests to evaluate the performance of

the directional source and receiver and their effectiveness in detecting a towed target. Data from this trial

will be used to develop algorithms to manage the transmitted signals, to process the received signals, and

to detect and track targets.

This field trial will take place on the Nanoose 3-D Range at CFMETR, a DND facility. The trial will use

CFMETR ships CFAV STIKINE and CFAV SIKANNI, which are torpedo and ship ranging vessels

(TSRV) They are 32.9 m long with a 8.5 m beam, a displacement of 290 tons and a speed of

approximately 15 knots. The trial will not require range tracking support.

2 Organizations

This sea trial is a specific activity planned for and supported by DRDC Project 01CC (Torpedoes and

Torpedo Defence WBE 2 Active Torpedo Detection). The sponsor of this Project is Director Naval

Requirements 5.

The lead DND organization is: DRDC – Atlantic Research Centre.

The Canadian Forces Maritime Experimental and Test Ranges (CFMETR) is a partner in this sea trial.

1 Descriptions of TOMCAT, HFTA and the Sharko towed target can be found in Annexes A–C.

2 DRDC-RDDC-2017-D150

3 Objectives

The specific scientific and technical objectives of this sea trial are:

1. To perform engineering trials of the new towed acoustic source and the newly reconfigured towed

array.

2. To measure the beam patterns of the towed acoustic source at a series of frequencies.

3. To record signals transmitted by the towed acoustic source, including signals reflected by the target.

4. To collect data to support the development of processing algorithms.

5. To test a HF multibeam sonar for potential interference with CFMETR underwater tracking systems.

4 CAF Support

This field trial will be held at CFMETR and will make use of their personnel as part of their regular

duties.

5 Locations

This field trial will be held at the CFMETR Nanoose Bay 3-D range, in operating area WG, which is

controlled by CFMETR. Hence a separate Area Clearance request is not necessary. This field trial will be

the primary user of the range.

6 Experiments

1. Assessment of TOMCAT towing depth-speed-layback characteristics:

– Measure the towing characteristics of the newly built TOMCAT directional acoustic source and

make adjustments necessary to achieve a stable tow at a depth of about 20 m. Record the depth vs

speed and layback for later use.

2. Assessment of HFTA towing depth-speed-layback characteristics:

– Measure the towing characteristics of the newly reconfigured HFTA towed array and make

adjustments necessary to achieve a stable tow at a depth of about 20 m. Record the depth vs speed

and layback for later use.

3. Acoustic testing of TOMCAT and the HFTA:

– Measure the beam pattern response of TOMCAT and the HFTA while both devices are being

towed. Measure background noise on the HFTA.

4. Testing of Towed Active Target Detection:


– Using a quasi-monostatic configuration, confirm the ability of TOMCAT-HFTA combination to

produce echoes from the Sharko towed target. Collect data to support the development of

processing algorithms, including runs with the target coming into and out of range, high and low

Doppler, various bistatic angles and various bearings relative to the tow ship using single and multi-

frequency signals. Also collect background noise and reverberation.

5. Multibeam Sonar Interference Evaluation:

– Evaluate the potential for interference between the multibeam sonar and the CFMETR underwater

tracking systems.

7 Schedule

Table 1: The approximate field trial schedule for November 2015.

Date Location Activity

Nov 21,22 Halifax to Nanaimo DRDC team flies to Nanaimo, BC.

Nov 22 CFMETR Begin unpacking and assembling equipment.

Nov 23 CFMETR at dock Assemble and test equipment alongside. Assemble TOMCAT on

the primary ship and test transmit capability. Assemble the HFTA

and Sharko on the target ship.

Nov 24–25 Operating area WG

at CFMETR

Primary ship will tow TOMCAT at various speeds (2–8 knots) and

depths along a generally straight path to determine depth vs speed

and scope. TOMCAT will be deployed and recovered several times.

Target ship will tow the HFTA at various speeds (2–10 knots) and

with variable cable scope to determine depth vs speed and scope.

After the HFTA has been recovered, the target ship will tow Sharko

instead. Sharko may be deployed and recovered several times.

Transmission measurements from TOMCAT to the HFTA.

Nov 26–27 Operating area WG

at CFMETR

Primary ship will tow both TOMCAT and the HFTA in a dual tow,

with the HFTA 50 m aft of TOMCAT. Target ship will tow Sharko

and maneuver within a few km of the primary ship. Sharko will act

as a target for the TOMCAT-HFTA active sonar. Tows will

typically be 15–20 m deep at 4–6 knots.

As a separate, independent activity, operate the Multibeam Sonar to

evaluate potential interference with the range tracking system.

Nov 27 pm CFMETR at dock Disassemble and pack equipment alongside.

Nov 28 CFMETR Complete packing of the equipment for transit.

Nov 28–29 Nanaimo to Halifax DRDC team flies to Halifax, NS.


8 Equipment

The following DRDC –Atlantic Research Centre scientific equipment will be used:

1. TOMCAT towed acoustic source with 200 m tow cable, amplifiers and controller;

2. High-Frequency Towed Array (HFTA) with 150 m tow cable, receiver, and recording unit;

3. Towed HF acoustic target (Sharko) with 220 m tow rope;

4. Omnidirectional hydrophone receiver (Reson TC4032); and

5. Kongsberg Mesotech SM-2000 multibeam sonar.

See also Annex D. DRCD Project 01CC will cover shipping expenses for this equipment to and from

CFMETR.

9 Proceedures

1. Assessment of TOMCAT towing depth-speed-layback characteristics:

– The primary ship will tow TOMCAT at various speeds (2 to 8 knots) and with variable cable scope

along a generally straight course. A fixed receiver on the target ship may be used to confirm

electro-acoustic response. TOMCAT may be deployed and retrieved several times as required.

2. Assessment of HFTA towing depth-speed-layback characteristics:

– The target ship will tow the HFTA at various speeds (2 to 10 knots) and with variable cable scope

along a generally straight course. The HFTA may be deployed and retrieved several times as

required. After the HFTA has been recovered, the target ship may tow Sharko, subject to similar

tests as time allows.

3. Acoustic testing of TOMCAT and the HFTA:

– Measure the beam pattern response of both TOMCAT and the HFTA while the devices are being

towed on parallel and anti-parallel paths at separations between 200 m and 2 km. Measure

background noise on the HFTA. See Annex E for more information on equipment operations.

4. Testing of Towed Active Target Detection:

– The primary ship will tow both TOMCAT and the HFTA in a dual-tow configuration at speeds

approx. 4 to 6 knots along a generally straight course. TOMCAT will have a cable scope of about

100 m. The HFTA will be towed about 50 m aft of TOMCAT. The target ship will tow Sharko at

speeds up to 10 knots with a cable scope between 100 m and 200 m. The target ship will perform

both parallel runs and overtaking maneuvers in the vicinity of the primary ship. A minimum CPA to

the primary ship of 200 m will be respected.

5. Multibeam Sonar Interference Evaluation:

– As a separate, independent activity, the Multibeam Sonar will be operated on the primary ship while

the target ship maneuvers in and out of the field of view of the sonar. The target ship will operate a

tracking pinger for assessment of potential interference between the Multibeam Sonar and the range

tracking system. The activity will take a few hours and will occur at the convenience of the range.


10 Records and Reports

The chief scientist and designated persons will keep a written log of all scientific operations, including

computer data logging. At the completion of the trial the chief scientist will collate and reconcile all

written and electronic logs in order to produce a sea trial summary report. A hotwash summary will be

produced within two weeks of the completion of the sea trials. A draft sea trial summary report, intended

to be publically releasable, will be completed within two months of the sea trial. These data and results

will be used in final project reports scheduled for completion in FY16/17, and depending on quality of the

results may form the basis for a scientific publication.

At the completion of the sea trials, computer data files will be backed up on appropriate removable media

and hand-carried back to DRDC. Recording media will be subject to appropriate DRENet scanning

procedures.

CFMETR is responsible for the collection, post-processing and archiving of any oceanographic and

meteorological data collected during this sea trial.

11 Security

All aspects of this sea trial are UNCLASSIFIED. The acoustic equipment under test are NOT designated

Controlled Goods.

12 Safety

General conduct of trials and ship-board life will be governed by the DRDC document Guidelines for

Seagoing Personnel. The Chief Scientist is responsible for safety supervision of the DRDC personnel on

the trial. With respect to health and safety procedures, the CFMETR Range Operations Officer will have

final authority regarding ship and crew employment.

No explosives or hazardous materials will be used during this sea trial.

13 Environmental

This trial will be held at CFMETR and is covered under the standing DND Environmental Assessment for

CFMETR, which can be found at http://esquimalt.mil.ca/cfmet/environment.htm. Operations will be

conducted in accordance with CFMETR environmental policies.

The acoustic source levels and frequencies of sources employed during this trial, and the length and duty

cycle of the pings are such that they should not cause distress to marine mammals. Following a

precautionary approach, a minimum separation of 500 m between marine mammals and any acoustic

http://esquimalt.mil.ca/cfmet/environment.htm


sources will be maintained. A visual watch for marine mammals will be maintained during times when

acoustic sources are used.

14 Weather

It is believed possible to conduct operations up to the upper limit of Sea State 4 (wind speeds of

16 knots). Assessment of weather conditions will occur at 0700h on sea-going days. CFMETR range staff

have final authority on safe operating conditions.

15 Communications

CFMETR personnel will provide all necessary communications equipment for use on the range. DRDC

personnel will follow CFMETR protocols for communication while at the range. The CFMETR contact

numbers are:

CFMETR HQ 5011 (on site) or 250-468-5011

Range Operations Centre (24 hr Security Desk) 5080 (on site) or 250-468-5080

CFMETR Main Gate (24 hr Commissionaire) 5060 (on site) or 250-468-5060

Fire / First Aid / Emergency 5000 (on site) or 250-468-5000

16 Personnel

The following DRDC Personnel will attend this trial:

Dr. Garfield Mellema (MAP Section) Chief Scientist

Dr. Mark Trevorrow (MAP Section) Scientist

Mr. Trevor Ponee (TS Section) Mechanical support

Mr. Dang Phan (US Section) HF towed array specialist

Mr. Mark Fotheringham (US Section) Acoustic source specialist

All travel, per diem, and accommodation costs for the DRDC staff will be covered under Project 01CC.

See attached Authorization for Overtime.


17 Signatures

Trial Chief Scientist: ______________________________________

Dr. Garfield Mellema, Defence Scientist/TorD

Section Head: ____________________________________

Mr. David Hopkin, H/MAP

Project Manager: ______________________________________

Ms. Elizabeth Blanchette, PMTD

Centre Director: ______________________________________

Dr. Calvin Hyatt, CD/DRDC – Atlantic Resear

17.1 Distribution List

17.1.1 DRDC – Atlantic Research Centre internal:

Dr. Garfield Mellema, Chief Scientist

Dr. Mark Trevorrow, H/TorD

Mr. David Hopkin, H/MAP

Mr. Dan Hutt, H/US

Ms. Elizabeth Blanchette, aSH/TS, PMTD

Mr. Isaias Peraza, Project Engineer 01CC

17.1.2 External:

Mr. Ed Ferguson, PD Project 01CC, NDHQ


Annex A TOMCAT— TOwed MultiChannel Acoustic Transmitter

The TOwed MultiChannel Acoustic Transmitter (TOMCAT) is a towed directional projector. It is about

2.4 m long, 0.4 m in diameter and weighs about 100 kg when fully assembled. The forward, nose and tail

sections are removable and the centre compartment can be broken down once the transducer array has

been removed. It is normally shipped unassembled. When deployed, it is towed using a 200 m long,

20 mm diameter electro-mechanical cable.

At the core of TOMCAT is a phased array consisting of eight vertical staves, each consisting of four

free-flooded rings wired in parallel. The beam pattern produced by the array is relatively narrow in the

vertical and horizontal planes. Each stave is fed by a separate set of conductors in the tow cable, allowing

the projected beam to be steered in the horizontal plane by conditioning the signals to the individual

staves. As each steered beam occupies only a portion of the available bandwidth of the array, it is possible

to simultaneously project multiple, unique signals at different angles. This increases the coverage of the

projector while maintaining its directionality and can be highly effective in reducing interference due to

reverberation.

The operating frequency of TOMCAT is 8 to 14 kHz with maximum on-axis acoustic source levels of up

to 205 dB. Typical source signals are up to 250 ms in length at pulse intervals near 4 s.

TOMCAT is free-flooding, with internal depth and pitch-roll-heading sensors. It is essential that the

transducer array be oriented horizontally for proper operation. The forward section of the TOMCAT body

offers multiple tow points, in order to adjust its pitch. In addition, the orientation of the transducer array

can be modified relative to the tow body by adjusting its fore and aft mounting points. Typical towing

depths are near 20 m at 150 m layback at speeds of 4 to 6 knots.

Figure A.1: Isometric drawing of TOMCAT.


Figure A.2: Isometric drawing of TOMCAT.


Annex B HFTA—High Frequency Towed Array

The HFTA is a small towed acoustic array. It is about 1.6 m long, 60 mm in diameter and weighs

approximately 20 kg. It has 16 acoustic channels tuned for acoustic frequencies in the band 5 to 15 kHz.

Twelve (12) of the elements form a linear array and the rest are mounted in pairs orthogonal to the line of

the array and to each other to provide 3D directionality. It is towed using a 150 m electro-mechanical

cable. Typical towing depths are near 20 m at 150 m layback at speeds of 4 to 6 knots.


Annex C Sharko—Towed Acoustic Target

Sharko is a towed acoustic target very similar in size to TOMCAT. It is 2.4 m long by 0.4 m in diameter

and weighs approximately 100 kg (see photo). It is freely flooding and contains two 28 cm diameter

target spheres. It is towed with a 220 m long, 6 mm diameter AmSteel Blue (Dyneema) tow rope. Typical

towing depths are 20 m to 30 m at speeds of 4 to 8 knots.

Figure C.1: The Sharko towed target.


Annex D Equipment Packages

The High Frequency Towed Array (HFTA) includes the following:

1. The HFTA tow body;

2. A rope drogue;

3. The 150 m long tow cable on a wooden spool;

4. The M508 Receiver Box:

a. This box separates the towed array cable signals into 16 analog signals on a VHDCA

connector, the pitch-roll-heading sensor data in RS-232 format on a DB9 connector, and an

analog pressure (depth) signal on a BNC connector.

5. The Reach acoustic data recorder:

a. This recorder will digitize the 16 analog channels from the array; and

b. It receives GPS timing signals via an IRIG-B interface.

6. IRIG-B timing generator:

a. This device converts GPS signals into a 1 pps IRIG-B data stream for the Reach acoustic data

recorder.

7. Network time Server:

a. This is used to sync computer clocks to GPS time. It is especially important if the Reach

acoustic data recorder is not properly using the IRIG-B information.

8. GPS receiver:

a. This device will supply GPS information to the IRIG-B generator; and

b. This device will also provide position and time messages in RS-232 format to be recorded by

a computer.

9. USB to RS-232 adapter, to convert the RS-232 signals from the M508 receiver box;

10. USB to RS-232 adapter, to convert the RS-232 signals from the GPS receiver;

11. NI-DAQ analog to digital conversion module, to convert the analog pressure sensor signal from the

M508 receiver box;

12. Computer running LabVIEW:

a. To record the pitch-roll-heading sensor data from the towed array via M508 connector box

and the RS-232 to USB adapter;

b. To record the output of the pressure sensor via the NI-DAQ analog to digital conversion

module; and

c. To record GPS time and position as supplied by the GPS receiver.


The Sharko Target includes the following:

1. The Sharko tow body, which may be disassembled;

2. Two SonarBell LF target spheres, which fit inside Sharko. They are blue anodized aluminum, 27.5 cm

in diameter and weigh about 38.5 lb in air, about 14.5 lb in fresh water, and 52 lb in their packing case;

3. Two blue packing cases, 35 cm on a side, for the SonarBells;

4. A rope drogue; and

5. A 500 m long, 6 mm diameter AmSteel-Blue (Dyneema) tow rope.

The TOwed MultiChannel Acoustic Transmitter (TOMCAT) includes the following:

1. The TOMCAT tow body, which may be disassembled;

2. A rope drogue;

3. The 200 m tow cable;

4. A 20 m deck cable; and

5. Two electronics cases, one black, one blue.

GPS time and position recorder for use on the ship not carrying the HFTA:

1. GPS receiver;

2. USB to RS-232 adapter, to convert the RS-232 signals from the GPS receiver; and

3. Computer to record the GPS time and position information from the GPS receiver via the USB to

RS-232 adapter.

Self-contained pitch-roll-heading sensor-recorder RBR-420 for use in TOMCAT and/or Sharko.

Self-contained depth sensor-recorder BR-2050 for use in TOMCAT and Sharko.

The Reson TC4032 omnidirectional hydrophone includes the following:

1. Reson TC4032 omnidirectional hydrophone;

2. Protective cage for the hydrophone;

3. Extended length cable to connect the hydrophone to the amplifier;

4. Reson EC6073 hydrophone amplifier (requires external 12-24 V DC power); and

5. Power supply for the hydrophone amplifier.

The deep dive wing (DDW-1) is used to increase the depth of a towed device.

External hard drive to back up all of the acquired data.

Tape measure to locate the GPS antennas and the tow point.

Camera.

Equipment should be packaged for delivery to a specific ship.


Annex E Equipment Operation

1. Whenever TOMCAT is operating:

a. Install an RBR-420 roll-pitch-heading sensor and an RBR-2050 depth sensor.

b. The ‘Main – Torpedo Tomcat’ VI, which generates the signal transmitted by TOMCAT, will

record the time and file name of the transmitted signals. (VI = Virtual Instrument, a program

running under LabVIEW).

c. A terminal program, such as TAC32PLUS or TeraTerm should be used to log the GPS time

and position:

i. The GPS time and position come from a GPS receiver and can be recorded using a

USB-RS-232 interface.

d. The layback is recorded manually in the log book.

2. Whenever the HFTA is operating:

a. The Reach acoustic data recorder will record the acoustic signals received by the HFTA:

i. The acoustic signals come from the M508 HFTA controller via a ribbon cable.

ii. Record at 16 bits and 96 kbps unless otherwise specified.

b. The Reach acoustic data recorder will use IRIG-B signals to sync the recording time to GPS

time:

i. The IRIG-B signals come from an IRIG-B module connected to a GPS receiver.

c. The ‘Position and Attitude’ VI will record the roll-pitch-heading signals from the HFTA:

i. The roll-pitch heading signals come from the M508 HFTA controller as an RS-232

stream and can be recorded via a USB-RS-232 interface.

d. The ‘Lamda Depth Logger’ VI will record the depth signal from the HFTA:

i. The depth signal comes from the M508 HFTA controller as an analogue signal and is

recorded via an NI-DAQ A/D module.

e. A terminal program, such as TAC32PLUS or TeraTerm should be used to log the GPS time

and position:



f. The layback is recorded manually in the log book.

3. Whenever Sharko is used:

a. Install an RBR-2050 depth sensor.

b. A terminal program, such as TAC32PLUS or TeraTerm should be used to log the GPS time

and position:



c. The layback is recorded manually in the log book.


Annex F Environmental Assessment Requirements Decision Checklist

CAN UNCLASSIFIED

CAN UNCLASSIFIED

DOCUMENT CONTROL DATA (Security markings for the title, abstract and indexing annotation must be entered when the document is Classified or Designated)

1. ORIGINATOR (The name and address of the organization preparing the document.

Organizations for whom the document was prepared, e.g., Centre sponsoring a

contractor's report, or tasking agency, are entered in Section 8.)

DRDC – Atlantic Research Centre Defence Research and Development Canada 9 Grove Street P.O. Box 1012 Dartmouth, Nova Scotia B2Y 3Z7 Canada

2a. SECURITY MARKING (Overall security marking of the document including

special supplemental markings if applicable.)

CAN UNCLASSIFIED

2b. CONTROLLED GOODS

NON-CONTROLLED GOODS DMC A

3. TITLE (The complete document title as indicated on the title page. Its classification should be indicated by the appropriate abbreviation (S, C or U) in

parentheses after the title.)

Field Trial Plan: TATD System Trials at CFMETR, November 2015

4. AUTHORS (last name, followed by initials – ranks, titles, etc., not to be used)

Mellema, G.R.

5. DATE OF PUBLICATION (Month and year of publication of document.)

January 2018

6a. NO. OF PAGES

(Total containing information,

including Annexes, Appendices,

etc.)

23

6b. NO. OF REFS

(Total cited in document.)

0

7. DESCRIPTIVE NOTES (The category of the document, e.g., technical report, technical note or memorandum. If appropriate, enter the type of report,

e.g., interim, progress, summary, annual or final. Give the inclusive dates when a specific reporting period is covered.)

Reference Document

8. SPONSORING ACTIVITY (The name of the department project office or laboratory sponsoring the research and development – include address.)

DRDC – Atlantic Research Centre Defence Research and Development Canada 9 Grove Street P.O. Box 1012 Dartmouth, Nova Scotia B2Y 3Z7 Canada

9a. PROJECT OR GRANT NO. (If appropriate, the applicable research

and development project or grant number under which the document

was written. Please specify whether project or grant.)

01cc

9b. CONTRACT NO. (If appropriate, the applicable number under

which the document was written.)

10a. ORIGINATOR’S DOCUMENT NUMBER (The official document

number by which the document is identified by the originating

activity. This number must be unique to this document.)

DRDC-RDDC-2017-D150

10b. OTHER DOCUMENT NO(s). (Any other numbers which may be

assigned this document either by the originator or by the sponsor.)

11a. FUTURE DISTRIBUTION (Any limitations on further dissemination of the document, other than those imposed by security classification.)

Public release

11b. FUTURE DISTRIBUTION OUTSIDE CANADA (Any limitations on further dissemination of the document, other than those imposed by security

classification.)

CAN UNCLASSIFIED

CAN UNCLASSIFIED

12. ABSTRACT (A brief and factual summary of the document. It may also appear elsewhere in the body of the document itself. It is highly desirable that

the abstract of classified documents be unclassified. Each paragraph of the abstract shall begin with an indication of the security classification of the

information in the paragraph (unless the document itself is unclassified) represented as (S), (C), (R), or (U). It is not necessary to include here abstracts in

both official languages unless the text is bilingual.)

The Towed Active Torpedo Detection (TATD) system is a high frequency active sonar system

comprised of a towed directional source and a towed array receiver, as well as equipment on the

towing vessel to operate the source and process the received signals. The purpose of this system

is concept evaluation and development for the Torpedo Defence project.

This field trial is the first opportunity to validate and evaluate the operation of the newly

developed directional source, TOwed MultiChannel Acoustic Transmitter (TOMCAT), and the

newly reconfigured High Frequency Towed Array (HFTA). The system is to be tested against a

towed passive acoustic target, also recently developed for this activity. Data from this trial will

to be used to refine the system concepts and further develop the TATD system, by validating the

operation of the source and receiver, and advancing the signal processing aspects of this system.

This trial is to be held at the CFMETR 3D tracking range in November 2015, using two of their

ships, CFAV STIKINE (613) and CFAV SIKANNI (611).

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Le système remorqué de détection active des torpilles (TATD) est constitué d’un sonar actif

haute fréquence comportant une source directionnelle et un récepteur de réseau remorqués, ainsi

qu'un équipement sur le navire remorqueur pour exploiter la source et traiter les signaux reçus.

Ce système a pour objet l’élaboration et l’évaluation de concepts dans le cadre du projet de

défense antitorpille.

Les essais en conditions réelles constituent la première occasion d’évaluer et de valider

l’exploitation de la source directionnelle récemment mise au point, de l'émetteur acoustique

multicanaux remorqué (TOMCAT) et du réseau haute fréquence remorqué (HFTA)

nouvellement reconfiguré. Le système doit être vérifié par rapport à une cible acoustique

passive remorquée, elle aussi élaborée il n’y a pas longtemps pour cette activité. Les données de

ces essais serviront à affiner les concepts du système TATD et à le perfectionner davantage en

validant l’exploitation de la source et du récepteur et en progressant dans le traitement des

signaux.

Ces essais devaient être tenus au champ de tir 3D du CEEMFC, en novembre 2015, au moyen

de deux de leurs navires, le NAFC STIKINE (613) et le NAFC SIKANNI (611).

13. KEYWORDS, DESCRIPTORS or IDENTIFIERS (Technically meaningful terms or short phrases that characterize a document and could be helpful

in cataloguing the document. They should be selected so that no security classification is required. Identifiers, such as equipment model designation,

trade name, military project code name, geographic location may also be included. If possible keywords should be selected from a published thesaurus,

e.g., Thesaurus of Engineering and Scientific Terms (TEST) and that thesaurus identified. If it is not possible to select indexing terms which are

Unclassified, the classification of each should be indicated as with the title.)

active sonar; HFTA; phased array; sonar; TOMCAT; torpedo; torpedo defence; towed array

field trial plan: tatd system trials at cfmetr, november 2015and further develop the tatd system, by...

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