Longitude and Latitude of NASCData are copies from StoxAcousticData. Should these be stricctly defined as start positions?

[arnejohannesholmin]

In StoxAcousticData geographical position is defined by two sets of coordinates: Longitude, Latitude and LogOrigin, and Longitude2, Latitude2 and LogOrigin2. However, Longitude, Latitude are simply copied into the NASCData, which makes the interpretation of these ambiguous.

I propose to used start position as the definition in the NASCData, which must be calculated from the two sets of coordinates mentioned above.

The function getStartMiddleEndPosition() in RstoxFramework performs such a calculation, and could possibly be moved to RstoxBase.