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4 Management of data and reference parameters 
The process of data recording and administration comprises the necessary memories and processes 
for the storage of ship data, geographical data and navigational reference parameters. The sub 
processes considered here concern the scanning in of new data of the particular type, the modification 
of existing data taking into account access rights as well as the provision of these data for other proc 
esses. The requirements formulated here are thus restricted to the use of the administration functions 
just mentioned. For the requirements on the data types dealt with here, within the framework of imple 
mentation of the navigational process (i.e. “navigation” in the strict sense, see part A), reference should 
be made to Sections 2 and 3. 
Data and reference parameters stored within this process are of particular meaning with respect to the 
consistency and harmonization of all data provided by and used within the INS. They are also important 
to provide compatibility between task areas, functionalities and functions interlinked. 
I Dimensions, machinery data and manoeuvring characteristics of the vessel are important 
parameters, which are necessary to carry out all control functions as well as functions for 
planning the track. It has to be ensured that for each of these parameters one unique value 
is defined within the INS. 
II Geographical data may exist in the form of sea charts in paper form and/or in electronic 
form. With regard to integrated navigation systems, high requirements should be placed on 
electronic sea chart data in particular, since these are integrated “directly” in the system and 
the cross-relationships between sea chart and for example the track control system remain 
hidden from the user to some extent. With regard to "Management of data and reference 
parameters", the use of standardised data formats above all must be required for geo 
graphical data. 
III The definition of the location of different navigational sensors or antennas (e.g. measure 
ment of speed, water depth, position) is the base for reference parameters necessary to 
convert measured sensor values into a common ship-related reference system. All task ar 
eas processing position data or other geographical data do need the knowledge about the 
geodetical reference systems used or the parameters necessary to perform transforma 
tions between different geodetical reference systems.