Iím going through the same exercise (monohull though) right now in prep for offshore
. I have spares for the engine and genset (lots of filters, hoses, starters, all the correct fluids, etc).
Iím focused more on my ability to sail. So all new standing and running rig, spare lines (Dyneema) to use as makeshift standing, spare halyards / sheets
, old sails
as backups. Spare parts
winches and winch
Also just ordered an emergency rudder
and a spare steering
cable, and spare pump
and ram for autopilot
seems pretty important to me and often not considered.
Iíve installed four bilge
pumps and redundant fresh pumps - I prefer them deployed and ready as my ďsparesĒ. My bilge pumps also operate on low water (standard pump) and high water (high volume with alarm) and the other two are fore and aft on independent battery
Countless amounts of stainless hardware
, blocks, shackles, wire and lugs, hoses etc.
and redundant comms (two VHF
, sat phone
in grab bag with backup batteries
, Go! and SSB
and emails. Designed electronics
network so I can unplug a jammed net and still have GPS
Lots of stuff for handling leaks
wrap tape, tubs of that gunk you jam into a hole, wood pegs and a big rectangle of sailcloth with massive eyes on the corners to ďslideĒ under the boat
if we get a hull
breach to reduce water flow.
Two massive storm anchors (Spade @ 100 lbs and Mantus
@ 125 lbs) with one all chain and one chain+rope. Plus two fortress
- one light weight for kedging and one storm in storage
Lots of attention also on safety
and storm gear
(raft, hydro epirb
on boat, handheld epirb
in ditch), all vests with strobe, whistle, and AIS
raft, and JSD (drogue) with custom chain plates attached to hull to handle the load. Multiple MOB
systems (throw ring, lifesling, MOB
pole with AIS
Did I mention Iím now broke and canít afford to go? (not really but cash burn has been stunning)
Iíll be the first to admit Iím likely going overboard
... but itís our priority - everyone makes their own tradeoffs (and our boat is big enough to store it all)
Maybe most important ... donít forget the spare beer!