Get to know the new terms

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.