written or printed directions, delivered by the commanding officer of a convoy to the several masters of the ships under hls care, by which they are enabled to understand and answer his signals, to know the place of rendezvous appointed for the fleet in case of dispersion by storm, by an enemy, or other-wise. without sailing Instructions no vessel can have the protection and benefit of con-voy. Marsh. Ins. 368
Source: Black's Law Dictionary 2nd Ed (1910)