"Has with fortitude undergone the rigorous requirements of this school"
On one of my dunks we even had VRT on the course.
After that death immersion suits were only issued for all aircrew if the water was below 4 degrees. Aircrew that routinely used immersion suits would wear them when the water was much warmer.
My third course there was prior to a Cyprus tour so no immersion suits. Our sqn ldr persuaded them to let us wear suits on day 2 "for experience"
Sod' s law, calm sunny day for the single seat drills. We duly jumped in, did the bizz, got everything bailed out, buttoned up, inflated, and then considered job done. Unbuttoned, stretched out and enjoyed the sun.
Unlike JF we were left largely unmolested. We paddled to each other and ended up with all 5 lashed together.