3.2 Assumptions
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Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC.1/Circular.1238 – Guidelines for Evacuation Analysis for New and Existing Passenger Ships – (30 October 2007) - Annex 1 - Guidelines for a Simplified Evacuation Analysis for New and Existing Passenger Ships - 3 Method of evaluation - 3.2 Assumptions

3.2 Assumptions

 This method of estimating evacuation time is basic in nature and, therefore, common evacuation analysis assumptions should be made as follows:

  • .1 all passengers and crew will begin evacuation at the same time and will not hinder each other;

  • .2 passengers and crew will evacuate via the main escape route, as referred to in SOLAS regulation II-2/13;

  • .3 initial walking speed depends on the density of persons, assuming that the flow is only in the direction of the escape route, and that there is no overtaking;

  • .4 passenger load and initial distribution are assumed in accordance with chapter 13 of the FSS Code;

  • .5 full availability of escape arrangements is considered, unless otherwise stated;

  • .6 people can move unhindered;

  • .7 counterflow is accounted for by a counterflow correction factor; and

  • .8 effects of ship’s motions, passenger age and mobility impairment, flexibility of arrangements, unavailability of corridors, restricted visibility due to smoke, are accounted for in a correction factor and a safety factor. The safety factor has a value of 1.25.

Parent topic: 3 Method of evaluation
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