Locking knob enables the two rulers to be fixed in any given separation which allows rapid determination of GPS position. Has graduations and can be used as a protractor to determine compass bearing and a millimeter metric scale across bottom.
| Brand | Weems & Plath |
| _Size | 7" |
| Shipping Details | |
| Weight: | 3.00 lb |
| Length: | 0.0 in |
| Height: | 0.0 in |
| Width: | 0.0 in |