The boat came LOADED with tons and tons of spares, for which we are eternally grateful. We haven’t bought a screw or fastener  in a year and a half, and it’s nice to know we have a spare starter motor and alternator tucked away somewhere.  Sadly, though, so many of the spares were ruined (See Lesson Learned #6: Moisture) or obsolete.  For example, the boat came with a Garmin chart plotter from 1998, for which charts are no longer made, a spare head unit for it, and another, older spare head unit – all fairly useless without charts, and therefore no more useful as spares than the $100 handheld GPS unit.  We sold the old head units and freed up a square foot of space (which is A LOT on a boat).  When you’re planning your cruise, look carefully at what you’d really need in a pinch (spare water hose in case the one to your water tank dies – YES) and what you can buy or order where you’re going.  We’ve been in the Caribbean, where an Island Water World or Budget Marine (that stock pretty much everything) is rarely more than a day or two’s sail away.