Life vests with integral harness plus tether. Attach whistle and strobe to vest. Rig jacklines
. Plus all the other required stuff.
Don't leave the cockpit
in heavy weather
and/or at night without being attached to the boat by the tether. Life lines are a poor place to clip on.
If this is your first cat, you may have bought into hype about how stable they are and assume you won't be thrown about. Believe me, in heavy weather
, you may not be heeling, but you will be knocked about.
Prepare as though it is going to be the voyage to hell, then maybe you will get days on end of wonderful sailing.
Wishing you fair winds and following seas.