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Using the Small Boat Stadimeter
This boat stadimeter consists of a piece of wood, usually five and a half inches long and one inch wide. Attached to it is a small piece of light line with three colored knots which are used as follows:
- Black knot, nearest the wooden block, used when sighting an LCM(3).
- Red knot, middle knot, is used when sighting on LCV or LCVP.
- Green knot, the one closest to the eye, is used when sighting an LCM(3).
Although a boat stadimeter can be calibrated for various distances, the standard landing craft stadimeter in use is calibrated for distances of twenty-five yards to one hundred yards.
In order to use the boat stadimeter properly it is necessary to take the following steps:
- Identify type of boat sighted.
- Select proper knot.
- Place knot on cheekbone.
- Parallel stadimeter with course of boat.
- Line up zero with end of boat.
- Sight on and observe where line of sight between boat and eye cuts across graduated scale on stadimeter.
- Note the reading, interpolating between the numbers on the scale, if necessary.
The Small Boat Stadimeter