Raymarine Raychart Chartplotter RC530 PLUS Setting Guard Zones and Alarms, Guard Zone Display

Chapter 3: Standard Radar Operations 3-19

3.5 Setting Guard Zones and Alarms

The Pathfinder Plus Radar display allows you to set up one or two guard zones, using the ALARMS key. You can set up sector zones or 360° (circular) zones as shown in Figure 3-13.

Note: You can only view and control guard zones if you are using the Master display (that is, the display to which the scanner is connected).

Zones

RR

3nm 1/2 126°T

H-UP	AUTO
	T

IR

Setting Guard and Alarms

GRD

Guard zone 1, sector zone (short-dashed line)

Guard zone 2, circular zone (long-dashed line)

CURSOR

BRG 031° R

RNG 2.24nm

Figure 3-13: Guard Zone Display

D3975-1

Guard zones are fixed with respect to the ship’s heading marker (SHM), moving as the SHM moves. They also move if you offset the centre, or if you change the range scale, so that the area you have marked is maintained.

The guard alarm sounds when a target enters a guard zone, exceeding the target density threshold within the zone; the alarm also sounds on a repeater display. The alarm sensitivity control allows you to set the threshold above which a new target will trigger an alarm, and also to turn the alarm on or off.

Note: A guard zone only operates when the whole zone is displayed on the screen, or could be displayed by offsetting the centre. In addition, a guard zone is inactive for 10 seconds after it is placed or re-sized, to avoid inappro- priate alarms during positioning.

This section covers the following topics:

•Placing a guard zone

•Moving, reshaping or deleting a guard zone

•Controlling guard zone alarms