** Starter Solenoid
** Manual Bilge Pump Switch
** From Generator / Regulator into the Electrical System

slow

** Navagation lights
** Instruments & Depth Finder
** Cockpit / Courtesy Lights
** 12-Volt Outlet
** Cabin Light
** Voltage Meter

fast

That's just my opinion...

anything that carries a heavy load temporarily shouldbe a slow burn fuse;
anything you want to "save" from damage should be fast (electronics, etc)

if in doubt, use fast for everything and if it burns out quickly try slow; never
go to higher amperage unless you're sure that the load warrants it.

-j