Add 'Depth' Function to ALL Inertial System drivers, like GPS driver has

The GPS driver has the 'Depth' function, which allows the RTK Tide value to be recorded as a EC1 Depth record, so that it can be brought into the SBMAX Editor and output as an XYZ data set. Very useful for Land Topographic surveying.
Adding this feature to INS System drivers (Applanix POS MV, SBG, CODA, ixBlue, etc.) would allow users, who have these systems available for use, to record the RTK Tide values as EC1 records, also.