The terms and abbreviations used in the N2000 fairway and nautical chart reform are presented in the list below.
| ABBREVIATION | TERM | DEFINITION |
| BSCD 2000 | Baltic Sea Chart Datum | The Baltic Sea States use the common name Baltic Sea Chart Datum 2000. The marking BSCD2000 is the same as N2000 used in Finland and for example RH2000 used in Sweden |
| BSHC | Baltic Sea Hydrographic Commission | |
| EVRS | European Vertical Reference System | N2000 is compatible with the European Vertical Reference System EVRS2000. |
| HS | Safe clearance depth | The secured water depth of a fairway. The secured water depth is determined from the reference level. |
| IHO | International Hydrographic Organisation | |
| IMO | International Maritime Organisation | |
| JHS | Public administration recommendations | Defines the N2000 height system as Finland’s national height system |
| KS | Maximum authorised draught | The authorised draught of a channel refers to the maximum design draught at which a ship can use the channel. The authorised draught is determined from the reference level. |
| MSL | Mean Sea Level | The mean sea level of a certain period, practically the same as MW. |
| MW | Mean Water | Theoretical Mean Water |
| Theoretical Mean Water | The annual calculated mean sea level. The Finnish Meteorological Institute calculates the annual theoretical mean water. | |
| N2000 | Finland’s national height system | |
| NAP | Normaal Amsterdam Peil | N2000 is based on the zero level in Amsterdam. |
| NN, N43, N60 | National height systems previously used in Finland. |