Target angle

It may be used to compute point-of-aim for a fire-control problem when vehicle range and speed can be estimated from other information.

[2] Angle on the bow provided the basis for submarine attack decisions through the world wars.

When angle on the bow was less than 90° , the submarine would continue a submerged approach toward the target to launch torpedoes when angle on the bow increased to 90°  indicating the minimum range torpedo launch opportunity for the submarine with the given target course and speed.

As a practical matter, the speed differential required to run around a target meant most warships and ocean liners could not be attacked when angle on the bow was greater than 90° .

Dazzle camouflage patterns pictured in the black and white images illustrate a form of ship camouflage attempting to impair an observer's recognition of ship features.