All the other stuff plus...
Plastic ziploc bags of various sizes to keep dry stuff dry - such as paper towel,
toilet paper, etc.
Garbage bags to store paper
charts in when not in use.
A couple of wool watch caps. Even in the tropics it can be cold on the night watch with the
wind blowing.
An accurate chronometer, a
cheap sextant, HO 249, and Mary Blewett's "Celestial
Navigation for Yachtsmen" - you can easily learn at least to take a noon sight even if all the
electric stuff goes tits up.
Some general sailing/piloting
books - the wise sailor is always trying to improve his/her skills. For example, Dutton's
Navigation and Piloting.
I STRONGLY suggest you include - and read- the Pardeys' HEAVY
WEATHER SAILING - FOR SURE!!!!!!! If the weather goes south, the Pardeys' book can save you. Read their suggestions for
equipment for dealing with huge storms and include same in your
gear. You will feel more comfortable knowing how much people and
boats can take.
It is very wise to MAKE A PLAN for bad weather in advance, knowing that the forecasters don't always get it right.
Some good fun, non-serious reading material for the lovely days when the
autopilot is
steering you on a nice broad reach, the sun is shining, and the day is everything you had hoped for!