The experimental and theoretical study of life raft safety under strong wind

Experimental and Numerical Investigation of Towing Resistance of the Innovative Pneumatic Life Raft

“…Michał Wawrzusiszyn 2) conditions by Gdynia Maritime University [4,5,6] show the direct influence of life raft shape, construction materials, equipment and operational characteristics on the above mentioned factors. One of the main operational characteristics of a life raft is its performance under tow.…”

Reliability and uncertainty in determining search area during Search-and Rescue action

“…Risk assessment takes into account identification of accompanying uncertainties, qualities of a factor as well as features of an exposed organism, population or ecosystem [7] Knowledge of reliability characteristics of life-saving appliances, gained by SAR action coordinator [3,4,5], would make it possible to increase SAR action effectiveness by making decision as to sweeping the determined area first.…”

“…Lack of knowledge in which operational state a given life raft is (different leeways), results in that many such areas may appear, e.g. : -search area of a life raft without drift anchor and an unknown number of castaways, -search area of a life raft with drift anchor and an unknown number of castaways, Safety function -the life raft reliability R tr can be expressed as follows [4,5]: (1) where: R(x) -life raft reliability, safety function Z tr -maximum value of life raft speed (wind leeway) x -wind speed y -numerically expressed life raft speed a, b -mean values of the independent non-negative random variables A, B A -random variable of the gamma distribution G (α 1 , λ 1 ) B -random variable of the gamma distribution G (α 2 , λ 2 ).…”

Bayesian methods in reliability of search and rescue action

“…The tests performed by the CTO [2,12] and Aeronautical Institute [2, 13] made it possible to determine the wind leeway [2], and safety function -the life raft reliability R tr [5,6].…”

“…The safety function -life raft reliability [5,6] The survival probability of object in water, S p (t), is presented in Fig. 1.…”