| DRGARE | Dredged area |
| DWRTCL | Deep water route centerline |
| DWRTPT | Deep water route - part |
| M_QUAL | Quality of data |
| M_SREL | Survey reliability |
| OBSTRN | Obstruction |
| RCRTCL | Recommended route centerline |
| RECTRC | Recommended track |
| SOUNDG | Sounding |
| SWPARE | Swept area |
| TWRTPT | Two-way route part |
| UWTROC | Underwater/awash rock |
| WRECKS | Wrecks |