I am looking at writing a paper on search and rescue at sea. I am quite familiar with the IAMSAR Vol3 for use by marine stations and the procedure for establishing a datum in conventional MOB situations such as instant action and a delayed MOB.
However I am struggling to figure out how to calculate a datum in a missing persons scenario.
" Cook has not turned up for work, crew reports he was last seen at 22:00 lastnight"
I believe that a track line search would be appropriate. But what position do I use as a datum?
Is it a case of apply set and drift to the vessels 22:00 position and plot a course towards it?
I understand that a coast station would most likely take OSC of the operation, but If it was just one vessel how would this be done?