The minimum range at which a target can be detected is basically determined by which of the following?（）.

Compass error is equal to the（）.

A radar display which is oriented，so that north is always at the top of the screen，is called a(n)（）.

What will NOT induce errors into a doppler sonar log?（）

Gyrocompass repeaters reproduce the indications of the master gyrocompass. They are（）.

A Doppler speed log indicates speed over ground（）.

Error may be introduced into a magnetic compass by（）.

You are using a radar in which your own ship is shown at the center，and the heading flash always points to 0°. If bearings are measured in relation to the flash，what type of bearings are produced?（）.

An ECDIS is required to display which information?（）

A deadhead is a(n)（）.