Hi TomApple

Inclusion of a SOLAS Radar reflector may be beneficial.

http://www.sailgb.com/p/solas_radar_reflector_for_lifeboats_and_liferafts/

a liferaft drogue

http://www.sailgb.com/p/liferaft_drogue_mca/

and Canon image stablization binolculars

http://www.amazon.com/Canon-10x42-Stabilization-Waterproof-Binoculars/dp/B0007W4IW2

and for each man a Blizzard bag or Survival Jacket

http://www.blizzardsurvival.com/product.php/101/blizzard_survival_jacket

Rather than a survival blanket.