# ABEAM

 On the beam, a relative bearing at right angles to the ship's keel.

## Related Terms

### DOUBLING THE ANGLE ON THE BOW

A method of obtaining a running fix by measuring the distance a vessel travels on a steady course while the relative bearing (right or left) of a fixed object doubles. The distance from the object at the time of the second bearing is equal to the run between bearings, neglecting drift.

### RELATIVE BEARING

A bearing relative to the direction of the ship: the clockwise angle between the ship's direction and an object.

### TARGET ANGLE

The relative bearing of own ship from a target vessel, measured clockwise through 360°.

### DOUBLE THE ANGLE ON THE BOW

A navigational plot for obtaining distance off from a charted feature. A relative bearing on the object is taken and a steady course maintained; at the time when a second relative bearing is exactly double that of the first bearing, the distance off will be the same as the distance sailed between bearings.

### TO DRAW

1. To be immersed to a specified draft. 2. To change relative bearing forward or aft, or to port or starboard.

### ON THE QUARTER

Bearing approximately 135° relative (on the starboard quarter) or 225° relative (on the port quarter). The expression is often used loosely for BROAD ON THE QUARTER, or bearing exactly 135° or 225° relative.

### ON THE BOW

Bearing approximately 045° relative (on the starboard bow) or 315° relative (on the port bow). The expression is often used loosely for BROAD ON THE BOW, or bearing exactly 045° or 315° relative.

### COMPASS BEARING

Bearing relative to compass north.

### GRID BEARING

Bearing relative to grid north

### ASSEMBLED BEARING RUNOUT

A displacement of surface of bearing relative to fixed point when one raceway is rotated with respect to other raceway.

### Related questions

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