I go one further and enter coordinates of likely underwater structures from charts into my cheap n nasty GPS, great for those pinnacles!
Also good for trip distance, speed :twisted: and night navigation (not for the inexperienced)
One tip for others though - seal off the external aerial socket (if your GPS has one) there are electrons floating around this area and coupled with seawater makes a lovely green mess of your aerial connection!
I talked to the Garmin rep about this and he consistantly evaded any answers or solutions, including why there is no mention of this problem in the manual :evil: Insulation tape over the hole works well enough but you need to keep an eye on it, even though they are rated as "waterproof" :roll: Get a cheap yellow ETrex - suit a yak fine, and all the mapping stuff and colour screens are O.T.T. for yakfishing.
HLD