VOLUME I Multinational Maritime Tactical Instructions and Procedures

MTP 1(D), Vol. I
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position and intended movement (PIM). A reference position established by the OTC at a given
time and a forecast of the course(s) and speed(s) expected to be made good over the ground.
precedence. A designation assigned a message by the originator to indicate to communication personnel
the relative order of handling and to the addressee the order in which the message is to
be noted.
prevention of mutual interference.
1. Procedures to prevent interferences between active or between active and passive electromagnetic
or acoustic sensors of friendly forces.
2. In submarine operations, a system of procedures to prevent, on the one hand, submerged collisions
between friendly submarines, between submerged submarines and friendly ship towed
bodies or between submerged submarines and any other underwater object, and, on the other
hand, interferences with any underwater event.
probe. Any aircraft which carries out the visual identification of a specific target which has previously
been located by another means.
prudent limit of endurance. The time during which an aircraft can remain airborne and still
retain a given safety margin of fuel.
Q
QQ. The standard position in the force for the center of the front of the main body or convoy when
not in circular formation.
R
radar. Radio detection and ranging equipment that determines the distance and usually the direction
of objects by transmission and return of electromagnetic energy.
radar coverage. The limits within which objects can be detected by one or more radar stations.
radar picket. Any ship or aircraft stationed at a distance from the force protected, for the purpose of
increasing the radar detection range.
radar silence. An imposed discipline prohibiting the transmission by radar of electromagnetic signals
on some or all frequencies.
radio silence. A period during which all or certain radio equipment capable of radiation is kept
inoperative.
range. The distance between any given point and an object or target.
Glossary-17 CHANGE 1