Hi.

Think i can explain you calculation method. But please specify: you are talking about trim changes table for 100 tones of additional weight, isn't it? ■

To calculate the trim changes you should have next information:

Additional weight (W (MT)) – in our case it is 100 MT, but can be any other;

Suppose the ship is in the even keel position;

LBP (m) – length between perpendiculars;

LCG (m)– distance from the midship to the gravity center of the hold or any other compartment on the vessel;

Draught (D (m)) – specific draught for what you want to perform calculation;

TPC (t/cm) – draught change Tones Per Centimeter for draught D;

MCT (t*m/cm) – Moment to Change Trim for draught D;

LCF – Length to the Center of Flotation from midship.

If LCG or LCF are in forward to midship, you must be positive, otherwise – negative.

Then:

New draught will be: Dnew=D+W/TPC/100;

Distance between LCG and LCF: L=LCG-LCF;

Trim change: ∆T=W*L/MCT/100;

New draught at forward: Dfwd=Dnew+∆T/(LBP/(LBP/2-LCF));

New draught at aft: Daft= Dnew-∆T/(LBP/(LBP/2+LCF));

And finally:

Forward draught change: ∆Dfwd=Dfwd-D;

Aft draught change: ∆Daft=Daft-D;

Of course, you can make a perpendicular to draft mark correction then, but it will be only tiny part of millimeter correction. I never use it.

If you want to create trimming table, you have to repeat this calculation sequence for each draught and each compartment.

If you are working with general, not bulk cargo, LCG better to replace with distance from midship to frame that matches with gravity center of load unit.

I use small excel template for trimming table preparation and also I have built small but smart program for ship trimming while loading/discharging or ballast operations which works on data from trimming table. This program is used by more than hundred vessels today. I distribute it as freeware so, if some one will need it, I can share it.

Best regards, Vladimir. ■

Hi, Mark.

Please, give me some Email address where I can send files you need. ■

dear Vladimir i would really appreciate it if you could send me a copy of your trimming program. my email is nm95041@yahoo.com ■

Hi Vladimyr,

i have read that you did a spreadsheet for a trimming table

can you send me a copy of your spreadsheet please?

this is my email: alfredohernandezmaldonado@yahoo.com.mx

best regards

Jose Alfredo ■

Dear zaidmarkabi,

Every ship should have a draft table. Otherwise you cannot determine the cargo by reading the drafts.

The first derivative of the draft table is the TPC.

If you do not have the draft table, load the ship with known cargo loads and measure the draft.

Then you have an approximation of the draft table for the actual water density.

(This will not be an official draft table, which cannot be used for commercial purposes.)

Take care ■

Hello Vladimir

Could you please send your spreadsheet to me? cpilotjc@hotmail.com

Thank you very much! ■

Dear Vladimir,

Can I have the copy of your trimming table spreadsheet please. My email id is premendra.joshi@gmail.com

Thanks and regards .. Joshi ■

Originally Posted by Vladimir

To calculate the trim changes you should have next information:

Additional weight (W (MT)) – in our case it is 100 MT, but can be any other;

Suppose the ship is in the even keel position;

LBP (m) – length between perpendiculars;

LCG (m)– distance from the midship to the gravity center of the hold or any other compartment on the vessel;

Draught (D (m)) – specific draught for what you want to perform calculation;

TPC (t/cm) – draught change Tones Per Centimeter for draught D;

MCT (t*m/cm) – Moment to Change Trim for draught D;

LCF – Length to the Center of Flotation from midship.

If LCG or LCF are in forward to midship, you must be positive, otherwise – negative.

Then:

New draught will be: Dnew=D+W/TPC/100;

Distance between LCG and LCF: L=LCG-LCF;

Trim change: ∆T=W*L/MCT/100;

New draught at forward: Dfwd=Dnew+∆T/(LBP/(LBP/2-LCF));

New draught at aft: Daft= Dnew-∆T/(LBP/(LBP/2+LCF));

And finally:

Forward draught change: ∆Dfwd=Dfwd-D;

Aft draught change: ∆Daft=Daft-D;

Of course, you can make a perpendicular to draft mark correction then, but it will be only tiny part of millimeter correction. I never use it.

If you want to create trimming table, you have to repeat this calculation sequence for each draught and each compartment.

If you are working with general, not bulk cargo, LCG better to replace with distance from midship to frame that matches with gravity center of load unit.

I use small excel template for trimming table preparation and also I have built small but smart program for ship trimming while loading/discharging or ballast operations which works on data from trimming table. This program is used by more than hundred vessels today. I distribute it as freeware so, if some one will need it, I can share it.

Best regards, Vladimir.

Ill wait your email, main is chacin.jan@gmail.com thxxx ■

Originally Posted by Vladimir

Hi, Mark.

Please, give me some Email address where I can send files you need.

Dear Sir, kindly send me the software programe on my email id prateekgovind@gmail.com ■

Originally Posted by Vladimir

To calculate the trim changes you should have next information:

Additional weight (W (MT)) – in our case it is 100 MT, but can be any other;

Suppose the ship is in the even keel position;

LBP (m) – length between perpendiculars;

LCG (m)– distance from the midship to the gravity center of the hold or any other compartment on the vessel;

Draught (D (m)) – specific draught for what you want to perform calculation;

TPC (t/cm) – draught change Tones Per Centimeter for draught D;

MCT (t*m/cm) – Moment to Change Trim for draught D;

LCF – Length to the Center of Flotation from midship.

If LCG or LCF are in forward to midship, you must be positive, otherwise – negative.

Then:

New draught will be: Dnew=D+W/TPC/100;

Distance between LCG and LCF: L=LCG-LCF;

Trim change: ∆T=W*L/MCT/100;

New draught at forward: Dfwd=Dnew+∆T/(LBP/(LBP/2-LCF));

New draught at aft: Daft= Dnew-∆T/(LBP/(LBP/2+LCF));

And finally:

Forward draught change: ∆Dfwd=Dfwd-D;

Aft draught change: ∆Daft=Daft-D;

Of course, you can make a perpendicular to draft mark correction then, but it will be only tiny part of millimeter correction. I never use it.

If you want to create trimming table, you have to repeat this calculation sequence for each draught and each compartment.

If you are working with general, not bulk cargo, LCG better to replace with distance from midship to frame that matches with gravity center of load unit.

I use small excel template for trimming table preparation and also I have built small but smart program for ship trimming while loading/discharging or ballast operations which works on data from trimming table. This program is used by more than hundred vessels today. I distribute it as freeware so, if some one will need it, I can share it.

Best regards, Vladimir.

Dear Vladimir

Good day

I was searching on line regarding ship trimming software, came to know through your mail on Bulk online that you made the software on same. I am still sailing therefore would like to try your software ( if possible). Also if you have any software to calculate exact BM SF and gz( KN) of the vessel which can be used to different vessels after

input the value ( from Hydrostatic Table) would like to buy. My mail id ( malik7319@gmail.com)

Thanks

BRGDS.

sanjay ■

Originally Posted by maliksanjaymalik

Dear Vladimir

Good day

I was searching on line regarding ship trimming software, came to know through your mail on Bulk online that you made the software on same. I am still sailing therefore would like to try your software ( if possible). Also if you have any software to calculate exact BM SF and gz( KN) of the vessel which can be used to different vessels after

input the value ( from Hydrostatic Table) would like to buy. My mail id ( malik7319@gmail.com)

Thanks

BRGDS.

sanjay

Good day

I was searching on line regarding ship trimming software, came to know through your mail on Bulk online that you made the software on same. I am still sailing therefore would like to try your software ( if possible). Also if you have any software to calculate exact BM SF and gz( KN) of the vessel which can be used to different vessels after

input the value ( from Hydrostatic Table) would like to buy. My mail id ( malik7319@gmail.com)

Thanks

BRGDS. ■