# What are damage stability criteria for passenger ships as per SOLAS?

 Passenger ships – Longitudinal extent of damage; 3m + 3% of L or, 11m whichever is least. Where the required factor of subdivision is 0.33 or less the longitudinal extent must be increased to include flooding of any three consecutive compartments. Passenger ships – Transverse extent of damage; 20% of B measured inboard from the ship’s side at right angles to the centreline at the level of the deepest subdivision load waterline taken parallel to the keel Passenger ships – Vertical extent of damage; From the baseline upwards without limit Any other damage; If any damage of a lesser extent would may cause a more severe condition regarding heel or loss of metacentric height, such damage shall be assumed for the purpose of the calculation Passenger ships – When does the damage stability apply?; In the final stage after damage and after equalisation Passenger ships damage stability – Residual area under curve; At least 0.015mr measured from the angle of equilibrium to the lesser of; – Angle of flooding – 22 deg from upright (one flooded compartment) or 27 deg from upright (two or more flooded compartments) Passenger ships damage stability – Range of positive stability; At least 15 deg beyond angle of equilibrium Passenger ships damage stability -Maximum GZ; Residual righting lever (GZ) value to occur within the range of positive stability when determined by the formula; GZ(m) = heeling moment / displacement (+ 0.04) When the heeling moment is taken as the greater value of any one of the following effects; – Crowding of passengers to one side of the ship – Launching of all fully loaded, davit launched survival craft on one side of the ship – Pressure of wind on the side of the ship In no case shall the GZ value so determined be less than 0.1m Passenger ships damage stability – Assumed flooding; Sufficient intact stability in all conditions to withstand flooding of any 1 main compartment or; -Where factor of subdivision is 0.33 – 0.5 to withstand the flooding of any 2 adjacent compartments or; – Where factor of subdivision os 0.33 or less to withst and the flooding of any 3 adjacent main compartments Passenger ships; Define ‘Margin Line’ A line drawn at least 76mm below the upper surface of the the bulkhead deck at the side of a subdivided ship Passenger ships; Define ‘Bulkhead Deck’ The uppermost deck to which the transverse watertight bulkheads are carried Passenger ships; Define ‘Factor of Subdivision’ Is a number with a maximum value of 1. It varies inversely as the length of the vessel and number of passengers increase. i.e. Longer vessel, more passengers = Smaller F Passenger ships; Define ‘Permissible length’ Equal to the Floodable length x Factor of Subdivision (F)The The maximum length of a compartment shall not exceed it’s ‘Permissible length’ Passenger ships; Define ‘Floodable length’ Maximum length of that portion having it’s centre at a given point which can be flooded without submerging any part of the margin line when the ship has no list

From Marine Enclyopedia to MARINE GYAAN ACADEMY in Lucknow - Preparing YOUTH to become SEAFARERS ( for IMU-CET and various courses) From Marine Enclyopedia to MARINE GYAAN ACADEMY in Lucknow - Preparing YOUTH to become SEAFARERS ( for IMU-CET and various courses) From Marine Enclyopedia to MARINE GYAAN ACADEMY in Lucknow - Preparing YOUTH to become SEAFARERS ( for IMU-CET and various courses) From Marine Enclyopedia to MARINE GYAAN ACADEMY in Lucknow - Preparing YOUTH to become SEAFARERS ( for IMU-CET and various courses)