A line of bearing to a known origin or reference, upon which a vessel is assumed to be located An LOP is determined by observation (visual bearing) or measurement (radar, horizontal sextant angles) An LOP is assumed to be a straight line for visual bearings, or an arc of a circle (radar range)
Hanging down; as, lop ears; used also in compound adjectives; as, lopeared; lopsided
Loss of Pointer: A condition at the receiver or a maintenance signal transmitted in the PHY overhead indicating that the receiving equipment has lost the pointer to the start of cell in the payload This is used to monitor the performance of the PHY layer