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CONTENTS

1. Introduction 2

2. Objectives 3

3. Cruise Itinerary 3

4. Participants 4

5. Area of operation 5

6. Survey Equipments and Methodology 6

7. Diary of events 11

8. Acknowledgments 15

Annexure-I Details of survey lines 16

Annexure-II Details of SVP operations 17

Annexure-III Details of Sediment Sampling 18

Annexure-IV Details of SBP & SSS data 19 Annexure-V MBES Calibration Report 20 Annexure-VI SB3012 - Dry-docking works 29 Annexure-VII SB3012 - Scope of dry-docking works 33 Annexure-VIII SB3012 - Service Report 39

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1. INTRODUCTION

Judicious utilization of offshore resources is very vital for the economic prosperity of any

country in the world. The control over the oceans is regulated by the Law of the Sea

Convention of 1982, which came into force on November 16, 1994 and it defines oceanic

jurisdiction for all states. This Law extends the legal right to the coastal states to exploit,

develop, manage and conserve all resources to be found in the water and in the sub-soil of

an area extending 200 nautical miles from its shore.

Fig 1: Zones of National Jurisdiction under the Law of Sea Convention of 1982

India has the 12th largest Exclusive Economic Zone (EEZ) in the world with 23,05,143 km2

along its 7516.6 km coastline (including the coastline of Andaman and Nicobar Islands and

Lakshadweep Islands). This constitute about two-third of the land area of the country.

Realizing the need to be cognizant about the enormous potentials of our country’s EEZ, the

government of India has decided to prepare a comprehensive map of entire EEZ of India

during the 11th Five Year Plan (2007 - 2012) and National Centre for Antarctic and Ocean

Research (NCAOR), Goa has been appointed as the nodal agency for the implementation of

this programme.

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Fig 2: Map showing India’s EEZ

2. OBJECTIVES

The primary objective of the SK-282 cruise was to undertake multibeam bathymetric

survey in the Western Andaman region within the EEZ of India. This survey was carried

out under the EEZ programme with the objective of preparing a topographic map. Sediment

sampling was also carried out for the Andaman Project.

The other objectives include:

1. Magnetic data collection along survey tracks

2. Sub-bottom profiling data collection along survey tracks

3. Trials of Side Scan Sonar

3. CRUISE ITINERARY The SK-282 cruise sailing started from Chennai Port at 1930 hours on

05th march 2011. After the successful completion of the survey the vessel returned to

Chennai port on 03rd April 2011.

Departure: Chennai 05.03.2011

Arrival: Chennai 03.04.2011

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4. PARTICIPANTS

A total of 13 scientific personnel participated in the SK-282 cruise, which includes Six

Scientists and Two Assistants from NCAOR, One SB3012 Expert from M/s L-3

Communications ELAC-Nautik (Germany) and Four Engineers from Norinco Pvt. Ltd.

List of Participants:

SN NAME Organization Designation

01 Abhishek Tyagi NCAOR, Goa Chief Scientist

02 Avinash Kumar NCAOR, Goa Scientist

03 Ajeet Kumar NCAOR, Goa Scientist

04 Vineesh T. Chacko NCAOR, Goa Scientist

05 Ashlesa Saxena NCAOR, Goa Scientist

06 Gireesh R. Nair NCAOR, Goa Scientist

07 Amey Hajare NCAOR, Goa Project Tech. Assistant

08 Bibin Abraham NCAOR, Goa Shipboard Assistant

09 Joerg Brockhoff L-3 Comm. ELAC-Nautik Manager System Services

10 K. Madhusudan Norinco Pvt. Ltd. AMC Engineer

11 T. Ramesh Norinco Pvt. Ltd. AMC Engineer

12 E. Vasantharaja Norinco Pvt. Ltd. AMC Engineer

13 Palani Sakthivel Norinco Pvt. Ltd. AMC Engineer

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5. AREA OF OPERATION

The present cruise was carried out in the Western Andaman EEZ region in pre-determined

survey block. A total area of around 10410 km2 was covered during the bathymetric survey.

The bathymetric data was collected along ~5200 Lkm tracks.

Fig 3: Area of operation for the SK-282 cruise

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6. SURVEY EQUIPMENTS & METHODOLOGY

1. SB-3012 Multibeam Echosounder System:

SeaBeam 3012 Multibeam Echosounder onboard ORV-Sagar Kanya was used to

carry out the present survey. The SB3012 is a 12 KHz, max. 201 beam sonar system,

with an effective 150 of swath. The system has a beam width of 1 degree at nadir and

is capable of depths 200 metres to 11000 metres. The swath coverage depends upon

the beam angles. Multi beam system provides full swath coverage with minimum

beam angle. The beam angle and water depth are as:

Depth (m) Beam Angle (°) 200 - 500 ≈ 150 (Max) 500 – 1500 ≈ 145 1500 - 2700 ≈ 140 >4000 ≈ 90

The Multibeam survey was carried out using standard practice. The lines have been

run in order to obtain more than 20% coverage at maximum speed of 9 knots. Lines

are run in order to paint the area by following the outer beams of previous lines. A

line spacing of 3 nautical miles was maintained for the first two lines. Navigational

and attitude information is provided by C-NAV DGPS system. Ship track was

maintained within ±10 m. Total 15 Sound velocity profiles were taken from the

survey area. The specifications of the system are as:

Make: L3-Communications Elac-Nautik

No. of beams: 201

Swath coverage: 4 x Water Column

Frequency of operation: 12 KHz

Technology: Full motion compensation (Swept beam technology)

Depth performance: Max. 11,000 m.

Acquisition software: Hydrostar

Data Processing software: Eiva NaviPac

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The complete Multibeam system comprises of many sub systems:

Surface Sound velocity (SSV): The surface sound velocity profiler is an underway

ocean profiling system that can collect the water sound speed profiles while the vessel

is still in motion.

Side Scan Imagery: Online printer provided with system and annotation interval was

set at 30 minutes.

Gyro and Motion sensor: Multibeam system uses Octans sensor for Gyro and

motion input. Octans is an IMO-compliant survey-grade gyrocompass with an integral

motion sensor.

Positioning System: C-NAV DGPS subsystem is used for positioning accuracy. C-

Nav GcGPS corrections are similar to other wide area DGPS system such as the

Federal Aviation Administration’s (FDA) wide area augmentation system (WAAS).

The C-Nav GPS receiver can accept two different GcGPS correction service message

formats. The C-Nav, dual frequency, GPS user equipment receives either of these

corrections broadcast from the communications satellite, applies them its own

observed, refraction corrected C/A code, dual frequency observations, and performs a

navigation solution. The resulting corrected GPS position; velocity and time (PVT)

are output from the C-Nav equipment to other subsystems on the

platform/vehicle/vessel to support the navigation positioning control requirements.

Network Timeserver with GPS synchronized time base: LANTIME (Local Area

Network TIMEserver) provides a high precision time base to a TCP/IP network

(stratum-1-server). The NTP (Network Time Protocol) is used to synchronize all NTP

clients with the reference. LANTIME/GPS is a set of equipment composed of a

satellite controlled clock GPS167, a single-board computer with integrated network

board and a power supply, all installed in a metal 19” rack on the single-board

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computer flash disk. After the network connection has been bestialized the time server

can also be configured and monitored remotely from a workstation via TELNET or

FTP.

Network Time Protocol (NTP): NTP is a common method for synchronization of

hardware clocks in local and global networks. Timeservers synchronize themselves by

a reference time source, such as a radio controlled clock, GPS-receiver or modem

time distribution. Stratum-1-servers distribute their time to several clients in the

network which are called stratum-2.

A high precision synchronization is feasible because of the several time references.

Every computer synchronizes itself buy up to three valued time sources. NTP enables

the comparison of the hardware times and the adjustment of the own clock, a time

precision of 128ms, often better than 50ms, is possible.

Sound Velocity Profiler (SVP): MIDAS SVP Sound Velocity Profiler was used to

measure the sound velocity profile. Its uses the advanced digital signal processing

technique that removes virtually all noise from the data. The sound pulse is both

transmitted and received, and allows measure the time of flight with a resolution of

1/100th of a nanosecond (10-11 seconds). The unit is fitted with the sound velocity,

pressure and temperature sensors. The sound

velocity profiler casting was carried out at 15

stations with depths ranging from 1000 to 2000

meters. The sound velocity and temperature is

plotted against water depth and analyzed.

Data Acquisition Software: Windows workstation was installed prior to SK-282

cruise and tested satisfactory. The Old Sun workstation will now be utilized as a

standby in case of any problems with the Windows workstation. Windows

Fig 4: Sound Velocity Profiler

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workstation is the operator control station and Hydrostar the operator control station

software. Windows workstation performs all commands to operate the SB3012

system. Hydrostar is a data acquisition and control system for Multibeam sonar. It

also acts as an interface for various external sensors (position, motion, heading and

sound velocity sensors).

NaviPac software is used for navigation and data acquisition from various feeds such

as GPS, Gyro, Motion sensor etc. NaviPac also allows the navigator to perform all

phases of surface navigation, to view all sensor data, to perform changes in navigation

principles and components. The programme reads all basic information from the setup

DB, present all available stations and let the navigator specify the stations wanted.

NaviPac is installed in Windows NT workstation. NaviEdit, NaviModel and NaviPlot

are the software to edit the data and create the model and plot the final chart.

Fig 5. Data Flow diagram

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2. Sub Bottom Profiler

GeoAcoustics Sub bottom profiler onboard was used to collect the sub bottom profile

data along all the lines. SBP contains four units:

GeoPro data processing unit: It is the main processing unit and MacOS is the

operating system. GeoPro software, which is a complete software system, installed in

the main unit and software features, such as acquisition, target analysis, mosaicing

and seismic processing are all part of one software application.

GeoPulse 5430A Transmitter: It is a stand-alone transmitter of 10 kW maximum

power output in a frequency range of 2 KHz to 12 KHz.

GeoPulse Receiver: The receiver is a universal amplifier/filter for use in sub bottom

profiling. The receiver, combining many functions, replaces many single function

boxes that would otherwise create space as well as interference problems.

Sidescan Sonar: Deck unit for side scan sonar operation is also installed in rack.

3. Magnetometer

The Geometrics Inc Ceisium Vapour marine

magnetometer (G-882) was used to collect

magnetic data along survey tracks. The

magnetometer fish is towed behind the ship at

length three times the length of the ship.

Technical Specifications of the G-882:

Operating Principle : Self-Oscillating split-beam Cesium Vapour

Operating Range : 20,000 to 100,000 nT

CM-221Counter Sensitivity : <0.004nT/Hz rms. Up to 10 samples per second.

Heading error : 1nT (over entire 360E equatorial and polar spin)

Absolute accuracy : < 1nT throughout Range

Output : RS-232 at 1200 to 19200 Baud

Operating Temperature : -30°F to +122°F (-35°C to +50°C)

Storage Temperature : -48°F to +158°F (-45°C to +70°C)

Fig 6: Marine Magnetometer

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Fig 7 : Gravity corer

Altitude : Up to 30,000 ft (9,000 m)

Water tight : Up to 9000 ft (2750m) depth operation

Power : 24 to 32 VDC, 0.75 amp at turn-on & 0.5 amp thereafter.

4. Sediment Samplers

Gravity corer was used for sediment sample collection at one location each. The

gravity corer allows researchers to sample and study sediment layers at the bottom of

oceans. The corer consists of an open-

ended tube with a lead weight and a trigger

mechanism that releases the corer from its

suspension cable when the corer is

lowered over the seabed and a small

weight touches the ground. The corer falls

into the seabed and penetrates it to a depth

of up to 6 m.

7. DIARY OF EVENTS

DATE EVENTS 05.03.2011 Vessel sailed out from Chennai Port and RFA at 2024hrs.

Vessel proceeding for Pitch Calibration site. 2330hrs – Portside PM motors stopped functioning.

06.03.2011 Posn @ 0800hrs – 13 29’N, 080 40’E; Drifting, Slight sea & swell.

0015hrs – Vessel arrived at Survey site and stopped for carrying out SVP cast.

During the operation the DSW wire rope slipped from the traction winch rollers. SVProfiler was heaved onboard with Atlas crane by fixing nylon ropes to DSW wire. The DSW wire rope problem was rectified and tried lowering the SVP again.

During the second operation about 10m wire was paid out when the DSW wire again slipped from the traction winch rollers and got stuck between a roller (facing bow) and main body.

0530hrs- SVProfiler was again heaved onboard with Atlas crane by fixing nylon ropes to DSW wire.

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1230hrs - Problem was rectified and about 30m DSW wire rope was cut as the wire was kinked and few threads seen parted (where the wire was stuck).

1300 to1430hrs - Carried out trials with weights upto ~100m and heaved/lowered several times to check stability.

SVP cast upto 2000m water depth before BOL-pitch calibration (Reverse course).

2300hrs - Started survey for Pitch Calibration in Reverse course track.

Problem with Starboard side PM's (Tachometer wheel displaced) at ~2345hrs rectified and reoccupied the track from beginning.

07.03.2011 Posn @ 0800hrs – 13 18.8’N, 080 02.2’E; SOG - 7.3kn, COG- 91deg, Depth- 3333m, sea state -2, Slight sea & swell.

0030hrs - Carried out verification of Pitch Offset after performing surveys on the predecided track using calculated pitch offset values.

Confirmed pitch calibration successful.

0400hrs - Proceeding to Andamans for recon MB survey of coring locations.

0500hrs - Magnetometer deployed.

Problem with Portside PM motors could not be rectified yet.

At present propulsion on Starboard side PM motors only and max. safe speed ~ 7knots.

08.03.2011 Posn @ 0800hrs – 13 22.5’N, 083 51.7’E; SOG – 6.4kn, COG- 89deg, Depth- 3269m, sea state -2, Slight sea & swell.

In transit to Andamans, GC-01 station.

Underway geophysical data collection incl. MB, SBP, MAG. 09.03.2011 Posn @ 0800hrs – 13 27.9’N, 086 45.7’E; SOG –7.2kn, COG- 88deg,

Depth- 3070m, sea state -2, Slight sea & swell.

In transit to Andamans. 10.03.2011 Posn @ 0800hrs – 13 29.04 N 089 39.4 E, SOG - 6.1kn, COG- 90deg,

Depth- 2929m, sea state -2.

In transit to Andamans. 11.03.2011 Posn @ 0800hrs – 13 30.2 N 092 12.7 E, SOG - 6.5kn, COG- 90deg,

Depth- 2092m, sea state -4, moderate rains & wind.

1005hrs- Mag towfish heaved onboard for GC operation 0950hrs.

1150hrs- GC-01 station at 92 23 20.432E, 13 30 23.0034N; Depth- 1162m; successful.

SVP cast at same location upto 1000m depth.

1350hrs - started sailing towards GC-02 station.

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1930hrs- MBES survey on Two parallel tracks to east of survey track between GC-01 & GC-02.

12.03.2011 Posn @ 0800hrs, 12 37.73 N 092 17.15 E, SOG - 6.1kn, COG- 185deg, Depth- 616m, sea state -4, drizzling.

0400hrs- MBES Survey completed and proceeding to GC-03 station.


1500hrs- Proceeding to Port Blair for repairs of Portside PM motors. 13th to 22.03.2011

At Port Blair for critical ship repairs.

22.03.2011 1700hrs - Pilot onboard

1736hrs - Pilot away

1800hrs - RFA

Sailing to survey area BLOCK-01. Shall cover seismic line E7 during approach, as discussed onboard.

23.03.2011 Posn @ 0800hrs, 12 15.591 N, 091 54.089 E, SOG - 8.8kn, COG- 343deg, sea state 3.

1100hrs - BoL-Seis E7, underway data collection incl. MBES, Mag & SBP.

2350hrs - EoL-Seis E7. 24.03.2011 Posn @ 0800hrs, 13 23.693 N, 089 59.998 E, SOG - 8.4kn, COG- 000deg,

Depth - 2906m , sea state 3.

0015hrs - DSW trials, OK.

0130hrs - SVP cast, few issues reported by Operators to Duty Engineer/ Chief Engineer.

0541hrs - L1 in Block-01 started. Time Server jumps date by nine months - unknown reason, rectified. 10 miles track was reoccupied.

25.03.2011 Posn @ 0800hrs, 15 07.762 N, 089 56.658 E, SOG - 8.2kn, COG- 180deg, Depth - 2687m , sea state 3.

0200hrs - EOL-L1. 0205hrs - Mag onboard.

0225hrs - SVP cast.

0440hrs - Mag deployed. 0605hrs - BOL-L2.

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0835hrs - MBES pinging but stopped receiving data. Restarted - working ok. 6nm track reoccupied.

1637hrs - EOL-L2.

1715hrs - BOL-L3. 26.03.2011 Posn @ 0800hrs, 14 40.935 N, 089 53.050 E, SOG - 8.2kn, COG- 000deg,


0646hrs - EOL-L3.

0814hrs - BOL-L4.

2045hrs - EOL-L4.

2118hrs - BOL-L5. 27.03.2011 Posn @ 0800hrs, 14 15.508 N; 089 45.621 E, SOG - 8.6kn, COG- 359deg,


0812hrs - EOL-L5.

0815hrs - Mag onboard. 0830hrs - SVP cast.

1020hrs - Mag deployed.

1120hrs - BOL-L6.

2142hrs - EOL-L6.

2154hrs - Mag onboard.

2215hrs - SVP cast. 28.03.2011 Posn @ 0800hrs, 13 45.083 N; 089 38.020 E, SOG - 8.7kn, COG- 000deg,

Depth- 2912m , sea state 3.

0015hrs - Mag deployed.

0030hrs - BOL-L7.

0920hrs - EOL-L7.

1030hrs - BOL-L8.

1922hrs - EOL-L8.

1935hrs, Proceeding to Chennai. 29.03.2011 Posn @ 0800hrs, 13 24.647 N, 088 27.872 E, SOG - 8.8kn, COG- 268deg,

sea state 3.

Sailing to Chennai. 30.03.2011 Posn @ 0800hrs, 13 17.311 N; 085 06.877 E, SOG - 8.7kn, COG- 265deg,

sea state 2.

Sailing to Chennai.

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31.03.2011 Posn @ 0800hrs, 13 08.983 N; 081 56.047 E, SOG - 8.5kn, COG- 270deg, Depth - 3426m, sea state 2.

2045-2145hrs, Side Scan Sonar trials carried out, Working OK.

Sailing to Chennai. 01.04.2011 Posn @ 0600hrs, 13 04.082 N; 080 24.178 E, SOG - 3.7kn, COG- 225deg,

sea state 3.

0624hrs, Anchored in outer anchorage at posn - 13 03.849N, 80 22.608E.

03.04.2011 Vessel berthed at Chennai Port. All scientists Disembarked. 7. ACKNOWLEDGEMENTS

Chief Scientist and the scientific participants of SK-282 cruise would like to express

their deep sense of gratitude to the Director, NCAOR for entrusting the

responsibilities of carrying out the assignments as well as for his constant

encouragement, motivation and support for the programme. Thanks are also due to

Dr. Anil Kumar, Mr. M.M. Subramaniam and the SK cell for their timely support,

cooperation and logistic arrangements. Onboard technical support offered by the

engineers from m/s NORINCO is gratefully acknowledged. Last but not least, the

Master and his crew deserve great appreciation for their exceptional support offered

during all the scientific operations.

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ANNEXURE – I

DETAILS OF SURVEY LINES

Date Time Longitude (E)

Latitude (N) Speed HeadingDepth(m)

Filename Remarks

23/03/11 05.30 91°46’58.59 12°38’27.89 8 289.9 2571 E7-20110323051221

BOL-E7

23/03/11 17.30 90°04’43.29 13°07’45.40 8.6 293.1 2966 E7-20110323173201

EOL-E7

24/03/11 05.41 89°59’55.61 13°27’01.25 6.7 036.7 2936 Block -1-20110324054044

BOL-L1

24/03/11 20.30 90°00’02.15 15°28’11.86 4.2 355.3 2625 Block -1- 20110324201008

EOL-L1

25/03/11 00.37 89°56’43.49 15°22’40.55 6.01 187.5 2646 Block-1-20110325002623

BOL-L2

25/03/11 16.37 89°56’18.03 13°26’51.84 8.1 173.7 2934 Block -1-20110325161749

EOL-L2

25/03/11 17.15 89°52’36.06 13°27’05.31 7.9 007.5 2913 Block -1- 20110325170348

BOL-L3

26/03/11 06.46 89°53’17.52 15°17’41.96 7.9 344.3 2661 Block -1- 20110326062748

EOL-L3

26/03/11 08.14 89°49’45.22 15°09’54.12 7.1 176.8 2683 Block -1- 20110326075637

BOL-L4

26/03/11 20.45 89°48’54.26 13°27’00.88 9.0 179.0 2928 Block -1- 20110326203243

EOL-L4

26/03/11 21.18 89°45’09.14 13°27’24.52 9.0 347.2 2930 Block -1- 20110326211817

BOL-L5

27/03/11 08.12 89°46’04.89 15°02’45.41 2.7 359.8 2706 Block -1- 20110327080933

EOL-L5

27/03/11 11.20 89°42’29.59 14°55’35.94 9.4 180.2 2744 Block -1- 20110327110746

BOL-L6

27/03/11 21.42 89°41’29.81 13°26’58.02 6.0 173.7 2938 Block -1- 20110327213129

EOL-L6

28/03/11 00.30 89°37’47.12 13°27’33.95 8.7. 011.2 2933 Block -1- 20110328001224

BOL-L7

28/03/11 09.20 89°38’42.18 14°46’00.91 8.6 355.3 2773 Block -1- 20110328090712

EOL-L7

28/03/11 10.30 89°34’30.72 14°39’45.17 7.8 175.5 2821 Block-1- 20110328101427

BOL-L8

28/03/11 19.22 89°33’59.79 13°27’04.03 8.4 211.0 2932 Block-1- 20110328191312

EOL-L8

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ANNEXURE – II

DETAILS OF SVP OPERATIONS

Date Start Time

End Time

Longitude (E) Latitude (N) Depth (m)

File name

11/03/11 12.45 13.35 92°23’30.39 13°30’22.87 1165 File 03.sva

23/03/11 18.30 22.57 89°53’18.35 13°09’49.61 2961 File 05.sva

24/03/11 20.52 23.00 90°00’03.19 15°28’16.52 2624 File 06.sva

27/03/11 08.30 10.10 89°46’05.45 15°03’04.39 2706 File 07.sva

27/03/11 22.15 23.57 89°41’01.00 13°25’34.93 2934 File 09.sva

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ANNEXURE – III

DETAILS OF SEDIMENT SAMPLING

Stn. Latitude (N)

Longitude (E)

Depth (m)

Recovery Remarks

SK- 282/ GC-01

13⁰ 30’ 23.0034

92⁰ 23’ 20.432

1162 239 cm Subsampling is done with 5 cm. intervals. Total 48 subsamples. Half of the core preserved as untouched. Clayey silt greyish colour sediments. Down core mostly compact clay

SK- 282/ GC-02

13⁰ 09’ 12.223

92⁰ 18’ 47.369

1058 190 cm Subsampling is done with 5 cm. intervals. Total 38 subsamples. Half of the core preserved as untouched. 0-40 cm. Coarse sand grains with mud greyish in colour 40-85cm. Brownish grey colour sediment mostly sandy clay. 85-110 cm. brownish black colour. Clay content increasing down core. 110-190cm. clay content is more. Greyish black in appearance

SK- 282/ GC-03

12⁰ 13’ 27.6204

92⁰ 14’ 06.8238

690 226 cm Subsampling is done with 5 cm intervals. Total 38 subsamples. Half of the core preserved as untouched. 0-50 cm. Greenish grey in colour 50-150cm. Brownish grey colour sediment contain shell fragments sand and clay. 150-226 cm. Dark grey colour. Compactness of clay increasing down core.

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ANNEXURE - IV

DETAILS OF SUB BOTTOM PROFILER DATA

Sl. No Date File Name 01 05.03.2011 SBP 20110305.Sit 02 06.03.2011 SBP 20110306.Sit

03 07.03.2011 SBP 20110307.Sit SBP 20110307A.Sit

04 08.03.2011 SBP 20110308.Sit SBP 20110308A.Sit

05 09.03.2011 SBP 20110309.Sit SBP 20110309A.Sit

06 10.03.2011 SBP 20110310.Sit SBP 20110310A.Sit

07 11.03.2011 SBP 20110311.Sit SBP 20110311A.Sit

08 12.03.2011 SBP 20110312.Sit SBP 20110312A.Sit

09 22.03.2011 SBP 20110322.Sit

10 23.03.2011 SBP 20110323.Sit SBP 20110323A.Sit SBP 20110323B.Sit

11 24.03.2011 SBP 20110324.Sit SBP 20110324A.Sit

12 25.03.2011 SBP 20110325.Sit SBP 20110325A.Sit

13 26.03.2011 SBP 20110326.Sit SBP 20110326A.Sit

14 27.03.2011 SBP 20110327.Sit SBP 20110327A.Sit

15 28.03.2011 SBP 20110328.Sit SBP 20110328A.Sit

16 29.03.2011 SBP 20110329.Sit SBP 20110329A.Sit

17 30.03.2011 SBP 20110330.Sit SBP 20110330A.Sit

18 31.03.2011 SBP 20110331.Sit

DETAILS OF SIDE SCAN SONAR DATA

Sl. No File Name 01 SK282-SSS-TRIAL 02 SK282-SSS-TRIAL01

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- * End of Report * -

multibeam swath bathymetric survey in bay of bengal within...

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