Three-Arm Protractor

Specifications

Three-Arm Protractor:
1.High accurancy.
2.Good quality with reasonable price.
3.Fast delivery with good afterservice.

Three-Arm Protractor :

Application:

The three-arm protractor cooperates with a sextant to measure the ship is position by either threepoint-two-angle method or angle-between-objeetive-plus-bearings method.

Specifications:

1. Diameter of the graduated circle:126.85mm

2. Arm length:340mm

3. length of connecting arm:290mm

4. total length of the pointing arm:630mm

5. minimal reading number:1min

6. differential drum type.