Koden MDC-2900, Operation Manual

Page: 61 / 191

Chapter 3 Primary operations (Menu) MDC-2900 Series
3-2 0093129012-06
3.2 STAB MODE
STAB MODE is a function to select speed for movement calculation for True trail, TT (ARPA), Past
position and True motion (TM).
Refer to “
Display ship’s trail
” (page3-9)
Refer to “
Target tracking TT (ARPA)
” (page3-24)
Refer to “
PAST POSN: Past position
” (page3-17)
Refer to “
For relative motion (RM) and true motion (TM)
” (page2-25)
SEA: Stabilization mode using speed over water.
GND: Stabilization mode using speed over ground.
[STAB MODE] can be changed directly at the upper left of the screen.
When SDME or EPFS is not usable by any reason, it is possible to get the speed over ground by
setting reference target.
Refer to “
Reference target acquisition
” (page3-26)
SEA (Sea stabilization)
SEA stabilization uses CTW (course through water) and STW (speed through water) referenced to
water. Accordingly course and speed indication at the top right side of the screen becomes CTW/STW.

STW is relative speed of the ship against water surface in the heading direction.

Information from SDME (speed and distance measuring equipment) like LOG is inputed by serial
data (VBW or VHW).

Single axis water log indicated as LOG on the screen cannot detect the effect of leeway.

When speed information is interrupted for 30 seconds from SDME by any reason or VBW water
status flag is invalid, speed indication becomes XXXX by red symbol.
In this case, speed can be entered manually.
Manual speed input.
1
Press [MENU] key, and [Menu] display is shown on the screen.
Select [MAINTENANCE] => [I / O] => [STW] => [MAN], and then press [ENT] key.
2
Press [MENU] key to erase menu.
3
Move cursor to the window on the right side of STW MAN in the top right side of the screen by the
trackball.
4
Press [ENT] key to get ready for speed entry. Enter speed by trackball.
5
Press [ENT] key to fix the input.