Your examiner asks: "What determines a radar's minimum range, and what determines its maximum range?"

A. MINIMUM RANGE (the closest distance at which a target can still be detected) is governed by: pulse length (a longer pulse is still being transmitted, or the receiver is still recovering, when the echo from a very close target would arrive — so shorter pulses give a smaller minimum range); receiver recovery time (the brief period after transmission during which the receiver cannot yet process incoming echoes); and antenna height and mounting (the scanner's vertical beam may not illuminate the sea surface immediately around the ship, especially if mounted high or if own-ship structure blocks the beam close in). MAXIMUM RANGE is governed by: transmitted power; PRF (a higher PRF reduces the time available for a very distant echo to return before the next pulse, limiting maximum unambiguous range); and ultimately the RADAR HORIZON — beyond the radar horizon the curvature of the earth means the beam cannot reach a target regardless of power.

B. Minimum range and maximum range are both fixed constants set by the manufacturer and cannot be affected by pulse length, PRF, or antenna height under any circumstances.

C. Minimum range depends only on gain setting; maximum range depends only on the anti-clutter sea control setting. Pulse length and antenna height are irrelevant to either.

D. Maximum range is governed by the vertical beam width alone, and minimum range is governed by the horizontal beam width alone.

A. Nothing — a test lift can proceed immediately after repairs

B. Testing should wait until cargo operations begin

C. The area within the grab's swing radius should be cleared of personnel before the lift

D. Only the crane operator needs to be aware the lift is happening

A. Who must remain clear of the exclusion zone while the lift takes place

B. The lunch schedule for the deck team

C. Only the weather forecast for the next watch

D. The cargo manifest for the next port