Info to be Supplied to Master and Simplified Stab Tables

Question 1

What information should be supplied to the Master?

Answer 1

• Minimum GM or Max allowable KG for a range of draughts and trims

Question 2

Describe the Simplified Stability tables?

Answer 2

• They are KG/ GM limit curves for different draughts and trims.
• They inform the officer if a proposed loading condition will comply with the intact and damage stability criteria.

Question 3

What is the purpose of Simplified Stability tables?

Answer 3

• Rapid and simple way for the Master to check if the vessel complies with the intact and damage stability criteria for its present condition.

Question 4

Method of use for the Simplified Stability tables?

Answer 4

• Calculate △ and KGe for the present condition.
• Compare this with the max permitted KG in Stability data booklet.
• KGe ≤ Max KG then it complies
• GMf ≥ min GM then it complies

Question 5

Effect of trim on KN values

Answer 5

• KN values will generally reduce (depends on direction of trim and hull form)
• Curve of statical stability will be similarly reduced

Question 6

What are the different conditions that must be included in a ships stability data booklet

Answer 6

Pax Ship
DEP/ 100% FO + FW/ Max Pax
ARR/ 10% FO + FW/ Max Pax
100% FO + FW/ No Pax
10% FO + FW/ No Pax

Cargo Ship
Fully loaded Cargo DEP/ 100% FO + FW
Fully loaded Cargo ARR/ 10% FO + FW
No Cargo (in ballast) / 100% FO + FW
No Cargo (in ballast) / 10% FO + FW

All Vessels
- Lightship
- Summer Load line