CARGOMAXTM

USB – PRO 2

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Contents

2 Introduction

3 Ship Data Page

4 Sign Convention

5 Ships Work area

6 Stowage Factor

7 Drafts Page

8 Trimming Page

9 Trim by Draft

10 Trim by Cargo

11 Passage Consumptions

12 Sag Effect

13 Hatch Breakdown

14 Report Page

15 Hydrostatics

16 Hydrostatic Graphs

18 File Structure

19 System Requirements

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Introduction

CARGOMAX USB PRO 2 is a new and improved system from the original

CargoMax USB. It is an innovative tool for ships Masters and Senior Officers who

monitor ship loadings. The program is designed and written by experts in the field of

ship loading and therefore is easy to use, providing instant and accurate results.

It is a self-contained system that can be used on any PC which has Microsoft Excel

installed. It is portable and transportable, containing over 5000 ships.

There is also a version for Windows Tablets which provides the convenience of

calculations on the run.

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Ship Data Page

The ship data page is the default page. It comprises of the ship name, ship data, hatch

data (LCG’s cubic capacities & tanktop limits) and draft mark distances. There are six

blue buttons on the right of every page. These buttons include ship data, drafts,

trimming, hatches, report and hydrostatics and are used to navigate around the program.

Click on these buttons to open the required page. Other buttons on this page are;

Change to a different ship in the database or work area.

Load and save your work.

Used to find a sister hull form with the same hydrostatics.

After saving your work always exit CargoMax from here.

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Sign convention

The sign convention used for CargoMax is as follows;

LCG and LCF are negative if forward of midships.

For’d perpendicular distance is always positive

After perpendicular distance is positive unless the marks read are aft of the AP

Midship correction is negative if the marks read are aft of the Plimsoll.

In the program you can hover over the red triangles for reminders of this convention.

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Ships Work Area

There are two sections – the one on the left shows all ships in the Ships Data

folder and the one on the right shows ships in the work folder. There are over

5000 ships in the database so to find a ship select the first letter of the name of

the ship at the top then scroll down to your vessel. You can either load it from

the main database or move a copy of it to the work folder and use it from there.

This is recommended. The work area is only designed to save up to 40 surveys

so keep this area clean. Once finished with a vessel you can delete it from the

work area using the button at the bottom right to keep it clean. This will not

delete the vessel from the database. If you have created a new ship and want to

add it to the database you can move it back to the database with the lower Move

arrow. All files are saved to and from the key so are portable and can be used on

any host PC running excel.

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Stowage Factor

The stowage factor page will tell you how much cargo will fit based on the cubic

capacities on the data page. It is particularly useful for volumetric cargoes like coal

which can fill the space. The units are given in ft3/tonne and also converted to m

3/tonne.

Enter the stowage factor in the yellow cell and check to see how much cargo will fit in

each hatch. Hit the Return button to go back to the data page.

When planning the cargo distribution it is advisable not to load the trimming holds more

than 97% full. This is in case the shore scale is more than the draft survey figure thereby

leaving more cargo for trimming. Most loading facilities calibrate their belt error to be

higher than the draft survey as a means of having a small safety margin during the

loading.

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Drafts Page

Enter drafts, density and weights in the yellow cells for the appropriate survey. There

are 4 areas of draft entry. Use the Int1 & Int2 sections for trimming. Make sure the data

you have entered is consistent with the ships condition. i.e. check the feedback below

the drafts to make sure it is correct. The trim, hog/sag and list are all key indicators.

Before going to the trimming page ensure that the interim survey drafts, density and

variables have been entered correctly. The known weights entered in the Int1 can

quickly be brought through to Int2 & Final using the button.

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Trimming Page

The trimming page can be used after the interim survey drafts and known weights have

been entered. This can be from either INT 1 or INT 2. Ensure that figures in these

sections are complete and correct before trimming. On this page you can select from:

“Trim by Draft”, “Trim by Cargo” or “Passage consumption”. Each of these are

discussed in the following pages. The trimming calculations are done using the

hydrostatic data and simultaneous equations. Ensure the hydrostatics are complete and

that you checked the graphs for them.

You will generally be trimming in two hatches. To select or de-select the hatches simply

click on them. If only one hatch is selected there will be calculation errors. If you wish

to load in more than 2 hatches, you can do so by entering the required amount in each

hatch. This can be done as a “trial and error” type calculation until the required drafts

are achieved. Use this method if topping up volume limited hatches, or to load max/min

ranges for different grades.

When trimming, the drafts calculated will include the deflection of the vessel as it was

at the interim survey. It is up to your professional judgement to allow for any changes to

the vessels deflection during the trimming pours.

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Trim by Draft

Use “Trim by Draft” to load to your desired maximum midship draft. Enter this draft

and required trim in the yellow cells and select the 2 trimming hatches so that they are

highlighted in green. Use the buttons to the right of the trim to select “by stern” or “by

head”. The resultant trimming pours and expected drafts are calculated automatically.

To load to the summer draft, with an allowance for dock water density, click on the

loadline button . Red overloading warnings will appear if the summer draft is

exceeded. This warning does not however take dock water allowance into account.

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Trim by Cargo

Use “Trim by Cargo” to load to a particular cargo figure. Enter this cargo figure and

required trim in the yellow cells and select the 2 trimming hatches so that they are

highlighted in green. Use the buttons to the right of the trim to select “by stern” or “by

head”. The resultant trimming pours and expected drafts (at perpendiculars and marks)

are calculated automatically. Red overloading warnings will appear if the summer draft

is exceeded. This warning does not however take dock water allowance into account.

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Passage Consumption

This area is used to calculate the bodily rise and change of trim during the passage. Use

this section for loadings that are restricted by arrival draft limits. Enter the LCG’s of

fuel and fresh water tanks that will be used enroute. Enter the required data in the

yellow cells to calculate the required departure draft and trim at the loading port. The

departure draft and trim are given in the green cells at the bottom. Always double check

with the ships loadicator to confirm these figures.

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Sag Effect

This information can be assessed from the button found on the Drafts –

Final page and also the trimming page. It give information regarding what the maximum

cargo could have been if the vessel completed with zero sag. It then tabulates how much

cargo was short due to various amounts of sag. Then at the bottom it gives the sag and

resulting shortage based on the ships final drafts for this loading.

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Hatch Breakdown

To enter the survey and cargo times click on the CHANGE DATES button. The Hatch

Breakdown calculation can be done at the interim survey or at the final survey. It may

be useful to conduct it at the interim survey to monitor different grade max/min ranges.

Tanktop limits can be monitored here to ensure limits are not exceeded. To do the

breakdown calculation enter the shore scale grades and values in the yellow cells and hit

the appropriate calculation button. You can print this calculation using the printer button

.

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Report Page

The draught survey report page displays all the important information used and

calculated in the survey. The yellow cells at the top are used to describe the voyage.

When the survey is complete you can print the survey report using the button at the

top. This report is a good place to check your manual calculations at each step through

the process.

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Hydrostatics Page

This page holds the ship’s hydrostatics data for ‘Displacement’, ‘TPC’, ‘LCF’ and

‘MTC’ These values are entered in the yellow cells at 20 centimetre draft intervals. The

CargoMax program will interpolate between the appropriate values.

The graph can be used to identify and significant errors in the hydrostatics data. An

abnormal spike in a graph is an indication that there is an error. To swap between

graphs click on the buttons bellow the graph.

By default the hydro range will be from 2.0m to 20m but if you are on a deeper vessel

you can hit the Big Ship button to allow hydros from 6m to 24m to be entered.

If moulded tables are used you can enter the keel thickness in (m) at the top left. e.g.

0.022 will be entered for a keel thickness of 22mm.

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Hydrostatics Graphs

This is the graph for displacement vrs draught and shows up as linear

This is the graph for LCF vrs draught and shows a smooth curve.

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Hydrostatics Graphs

Always check the Change in Displacement (LCF, TPC & MTC) as these will highlight

small errors. By placing the curser over the first spike you can see which draft may be in

error. The LCF, TPC and MTC curves may be not be smooth depending on the tables

however it will still highlight possible errors in the hydrostatics for you to check.

Remember that if you start with incorrect data then you will get incorrect calculations.

Hence you should always check the hydrostatics before using them.

Also double check the results by performing a manual calculation to ensure you have

confidence in the results.

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File Structure

Your USB key has a set file structure. Do not change this structure or your key may not

work. If you have other files you would like to store on the key it would be best to put

them in the “Documents” folder or create your own folder.

The “Ships Data” and “Work” folder are used by CargoMax to load and save ships. The

“Archive” folder is used to archive ships. The “Distance Data” folder is used by the

Navigation program to load and save your distance tables.

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System Requirements

CARGOMAX USB PRO 2 utilises the power of Microsoft Excel for its functionality.

Thus it requires that Macros are enabled. To do this, open Excel and go to the Tools

menu and select Macro – Security. We recommend you set the level to Medium or Low.

On the Medium setting you will be asked if you want to enable macros when you start

CargoMax – You must Enable them. On the Low setting CargoMax will run

automatically.

Different regions use different notation for the decimal. For example; some countries

use the comma (,) for the decimal. The date format also varies from country to country.

For example in some countries 12/01/2006 could mean Jan 12, 2006 or Dec 01, 2006.

CargoMax will only work if your computers’ region is set to English (Australia) or

equivalent. This fixes the decimal and date format issues noted above. To check and

change your computers region go Start – Control Panel – Regional & Language

Options, and select English (Australian) from the pull down list.

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Notes

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Phone or SMS

Louis 0409 345 887

Andy 0409 688 149

Bradley 0407 993 902

Refren 0438 009 969

Norman 0432 494 094

Weng 0457 783 746

Badge 0450 426 387

www.huntermarine.com.au

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“Powerful and easy to use”

CargoMaxTM USB has been written by

Captain L. Koutelas

www.huntermarine.com.au