CFR /  Title 33  /  Part 161  /  Sec. 161.20 Position Report (PR).

A vessel must report its name and position:

(a) Upon point of entry into a VMRS area;

(b) At designated reporting points as set forth in subpart C; or

(c) When directed by the Center. [CGD 90-020, 59 FR 36324, July 15, 1994, as amended by USCG-2003-14757, 68 FR 39366, July 1, 2003]