Given the 90 sec the chances are on my side.
30 years ago I was something of an expert at open water survival. As part of a safety research exercise I spent a week based on Guernsey with a team testing kit and techniques. One of the excersises was to take a group of around 30 first year Plymouth poly students, brief them in detail and them put them in the water alongside a fully inflated raft in open water and see what happened. The students were wearing light clothing and personal buoyancy aids. The only students that got into the raft were ones with previous experience. Without training a raft is of very little help. To put out a statement that if your engine fails over a stretch of water 18.5nm wide you are likely to die is just plain wrong unless you are a compete fool and have no plan at all. If you are planing a longer crossing then take it very very seriously.
Rod1