Koden MDC-2900, Operation Manual

Page: 62 / 191

MDC-2900 Series Chapter 3 Primary operations (Menu)
0093129012-06 3-3
GND (Ground stabilization)
GND uses COG (course over ground) and SOG (speed over ground) referenced to the ground.
Accordingly course and speed indication at the top right side of the screen becomes COG/SOG.

SOG is the absolute speed of the ship with reference to the land located in the course direction.

Two-dimensional GND SDME device like dual axis LOG and EPFS (electronic position fixing
system) give the information for serial input.

If both serial sentence data of VTG (EPFS) and VBW (SDME) are available, then VBW is given
priority.

If the failure of EPFS or SDME interrupts the speed information for 30 seconds or if the ground
status flag or VTG indicator flag is invalid, then the numeral indication of COG/SOG becomes
XXXX by red symbol.

If SDME or EPFS is not usable by breakdown or any reason, then COG/SOG can be obtained by
setting Reference target.
Refer to “
Reference target acquisition
” (page3-26)