Check the listing for details. Navigation Instrument Lot: Compass Slide Rule Plotter Divider Wind Wizard Books. Condition: Used. Listed at 60.00 USD. Our sailing days up and down the Florida Gulf coast are over. These items are typical of the era before GPS and used by my USN father who loved dead reckoning methods while I checked him on GPS. Items are pretty obsolete now, but doesn't hurt to have backup for when GPS goes out. Included are: Morin 2000 Hand Bearing CompassWeems & Plath Nautical Slide Rule 105C-Thru P72 Plotter 15"Weems & Plath Ultralight Divider No 176Davis Instruments Wind Wizard I am also including 4 books as shown in the photos. Americas Inland WaterwayBoaters Photographic Chartbook to Florida's West CoastThe Mariners Guide to Florida's West CoastNautical Chart Guide These books are a bit outdated and, of course, if you are not on the Florida Gulf Coast you don't need them. But, neither do we. Just good memories of the coast and many ports we visited. You can discard on your end if you don't want them.