Mariners are advised of a mandatory reporting system, "caldovrep", which goes into effect at 010001Z july

Original warning text

MARINERS ARE ADVISED OF A MANDATORY REPORTING SYSTEM, "CALDOVREP",
WHICH GOES INTO EFFECT AT 010001Z JULY. VESSELS OVER 300 GROSS TONS
MUST REPORT AS FOLLOWS:
 1. NORTHEAST BOUND TRAFFIC TO GRIS NEZ TRAFFIC VIA VHF CH 13 WHEN
    ABEAM THE BASSURELLE BUOY 50-33N 000-58E.
 2. SOUTHWEST BOUND TRAFFIC TO DOVER COAST GUARD VIA VHF CH 11 NOT
    LATER THAN CROSSING LINE FROM NORTH FORELAND LIGHT
    51-23N 001-27E TO THE BELGIAN/FRENCH BORDER 51-05N 002-33E.
 3. VESSELS NOT UNDER COMMAND, ANCHORED IN TRAFFIC SEPARATION SCHEME,
    RESTRICTED IN THEIR ABILITY TO MANEUVER, OR WITH DEFECTIVE
    NAVAIDS ARE ALSO REQUIRED TO REPORT.