| Designator |
Function |
Information required |
| System identifier |
|
GBT |
| A |
Ship |
Name and call sign |
| B |
Time (UTC) |
Only if report has been transmitted via
coastal radio station |
| C |
Position |
Geographical position by two 4 digit groups; or |
| D |
Position |
True bearing and distance given in nautical
miles from an identifiable point (state name) |
| E |
Course |
N or S bound |
| F |
Speed |
In knots (2 digit group) |
| J |
Pilot |
State whether a pilot is on board (e.g. PILOT EMBARKED) |
| L |
Route information |
State which channel the ship intends to pass
(Eastern or Western Channel) |
| Q |
Deficiencies |
Brief details of defects, deficiencies
or restrictions of manoeuvrability |
| U |
Tonnage (dwt)/Air draught |
State ship's deadweight tonnage
and air draught in metres |
