Summary of stability formulae
Variable immersion hydrometer: M y Density My ÿ Mx My ÿ x L
Trim
W GML 100 L Trimming moment Change of trim MCTC l Change of draft aft Change of trim L MCTC
Change of draft forward Change of trim ÿ Change of draft aft Effect of trim on tank soundings: Head when full Trim Length of tank Length of ship True Mean Draft: Correction Trim FY Length To Keep the Draft Aft Constant: MCTC L d TPC l To ®nd GML : GML L t GG1
Simpson's Rules 1st Rule: Area h/3 (a 4b 2c 4d e) or
1 3
CI S1
2nd Rule: Area 3h/8 (a 3b 3c 2d 3e 3f g) or 3rd Rule: Area h/12 (5a 8b ÿ c) or
1 12
CI S3
3 8
CI S2
381