How To Set The Ais Lost Target Alarm Filter; Vector Length, Vector Stabilization In True Motion Mode - Furuno FMD-3100 Operator's Manual

14.9.2

How to set the AIS lost target alarm filter

You can select what AIS targets to exclude from the lost target alarm, on the [Setting.
2] page in the [TT/AIS] menu.
MAX Range: Set the max. range at which a target must be to be declared a lost target.
MIN Ship Speed: Set the minimum ship speed a target must obtain to be declared a
lost target.
Except Class B: Exclude class B AIS targets from the AIS lost target alarm.
14.10 Vector Length, Vector Stabilization in True
Motion Mode
Ground stabilization and sea stabilization
Target vectors can be ground stabilized or sea stabilized in the True Motion mode. To
select speed over the ground or speed through the water data, open the [SPD] page
from the [System Sensor Settings] or [Local System Settings] menu. Select [Bottom]
for ground stabilization or [Water] for sea stabilization. The Vector mode indication
shows the stabilization mode in the true motion as [True-G] or [True-S].
Sea stabilization is a mode where own ship and all targets are referenced to the sea
using a compass heading and single-axis log water speed inputs in the true motion
mode. Ground stabilization is a mode where own ship and all targets are referenced
to the ground using the ground track or set and drift inputs. If the accuracy seems un-
satisfactory, enter set and drift corrections.
True vector
In the true motion mode, all fixed targets such as land, navigational marks and ships
at anchor remain stationary on the radar overlay with vector length zero. But in the
presence of wind and/or current, the vectors appear on fixed targets representing the
reciprocal of set and drift affecting own ship unless set and drift values are properly
entered.
In the true vector mode, there are two types of stabilization: ground stabilization (True-
G) and sea stabilization (True-S). The stabilization mode is automatically selected ac-
cording to speed selection, as shown in the table on the next page. Manual selection
is available with [Stabilization Mode] in the [SPD] page: [Bottom], [True-G], [Water],
[True-S].
14. AIS TARGET FUNCTIONS
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