Furuno FR-2105-B - Manual (Page 51)

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4. When the serial speed data is selected at the installation menu, select the speed mode,
STW (speed through the water) or SOG (speed over the ground). If pulse speed data is
selected, the STB/SOG does not appear.
5. Press the ENTER key to confirm your selection followed by the RADAR MENU key to
close the FUNCTIONS menu. The ship's speed readout at the screen top shows own
ship's speed fed from the speed log followed by the label "LOG."
Notes:
1) IMO Resolution A.823(19) for ARPA recommends that a speed log to be interfaced with
an ARPA should be capable of providing through-the-water speed.
2) Be sure not to select LOG when a speed log is not connected. If the log signal is not
provided, the ship's speed readout at the screen top will be blank.
3) SPEED **.* and SIGNAL MISSING “ LOG” appears if no log signal is present for 30 s
while the ship speed has been more than 5.0 kt.
4) With the serial speed inputs and SOG selection, if the type of data is changed from SOG
to STW, the label SOG appears in red at the upper right corner on the screen.
Manual speed input
1. Press the RADAR MENU and [0] key to show the FUNCTIONS 2 menu.
2. Press the [6] key to select menu 6 SHIP'S SPEED.
3. Press the [6] key to select (or highlight) MAN option.
4. Press the ENTER key to confirm selection. At this point, "MAN = XX.X KT" appears on
the FUNCTIONS 2 menu.
5. Enter the ship speed by hitting corresponding numeric keys followed by the ENTER
without omitting leading zeros, if any. For example, if the ship speed is 8 knots, [0] [8]
[ENTER].
6. Press the RADAR MENU key to close FUNCTIONS menu. The ship speed readout at the
screen top shows own ship speed entered followed by the label "MAN."