Featured Products
Click on image for more information
Search our Site
Return Policy
Privacy Policy
The Perfect Gift
Gift Certificates
Tell a friend
about GeoMart:
Pre-Approved Purchase Orders
GeoMart
516 Villanova Court
Ft Collins, CO 80525
800-248-6277
800-321-6277 Fax
Nautical Charts and More - TSD Calculators
Chart Tube | Compasses/Compass Kits | Dividers | Navigation Kits | Parallel Rulers | Protractor/Plotters |
Ships Curves | T-S-D Calculators | Vinyl Waterproof Chart Cases
BN30 TIME-SPEED-DISTANCE RULER
7" x 1¼" Clear Plastic. All you need is a pair of dividers and this ruler to calculate
time, speed or distance when 2 of the 3 variables are known. Instructions included.
usually ships within 24 hours
BN30
$2.95
Quantity
NATO PATTERN TSD SLIDE RULE BN102 - 300mm BN111 - 200mm
A simple device for calculating the third quantity given the other
two (i.e. distance covered, given speed and elapsed time).
$39.95
BN111 200mm
$29.95
BN27 TIME-SPEED-DISTANCE CALCULATOR (Wheel)
6¼" x 7¼". Printed in blue on plastic and laminated to ensure permanent
calibrations. Calculate time, speed or distance when 2 of the 3
variables are known. Also offers nautical miles vs. statute miles scale.
BN27
$13.95
