Garmin GPSMAP 7400 Series Owner's Manual

Also see for GPSMAP 8000 Series: Owner's manual Quick start manual Instructions Owner's manual Installation instructions

Contents

Garmin GPSMAP 7400 Series Owner's Manual Manual pdf 27 page image

Dual Range Mode: Provides a side-by-side view of both short-range and long-range radar data.Changing the Radar Mode1 From a combination screen or SmartMode layout with radar,select Menu > Radar Menu > Change Radar.2 Select a radar mode.Transmitting Radar SignalsNOTE: As a safety feature, the radar enters standby mode afterit warms up. This gives you an opportunity to verify the areaaround the radar is clear before beginning radar transmission.1 With the chartplotter off, connect your radar as described inthe radar installation instructions.2 Turn on the chartplotter.The radar warms up and a countdown alerts you when theradar is ready.3 Select Radar.4 Select a radar mode.A countdown message appears while the radar is starting up.5 Select Menu > Transmit Radar.Adjusting the Radar RangeThe range of the radar signal indicates the length of the pulsedsignal transmitted and received by the radar. As the rangeincreases, the radar transmits longer pulses in order to reachdistant targets. Closer targets, especially rain and waves, alsoreflect the longer pulses, which can add noise to the Radarscreen. Viewing information about longer-range targets can alsodecrease the amount of space available on the Radar screen forviewing information about shorter-range targets.• Select to decrease the range.• Select to increase the range.Tips for Selecting a Radar Range• Determine what information you need to see on the Radarscreen.For example, do you need information about nearby weatherconditions or targets and traffic, or are you more concernedabout distant weather conditions?• Assess the environmental conditions where the radar is beingused.Especially in inclement weather, longer-range radar signalscan increase the clutter on the Radar screen and make itmore difficult to view information about shorter-range targets.In rain, shorter-range radar signals can enable you to viewinformation about nearby objects more effectively, if the rainclutter setting is configured optimally.• Select the shortest effective range, given your reason forusing radar and the present environmental conditions.Zooming In and Out of the Radar Screen• Pinch two fingers together to zoom out.• Spread two fingers apart to zoom in.• Drag the screen to pan, and then select or to zoom, ifnecessary.Marking a Waypoint on the Radar Screen1 From a Radar screen or the Radar overlay, select a location.2 Select Create Waypoint.Sentry ModeSentry mode allows you to put the radar into timed-transmitmode, in which you can configure a radar transmit and standbycycle to conserve power. You can also enable a guard zone inthis mode, which identifies a safe zone around your boat andsounds an alarm when a radar object enters the zone. Sentrymode works with all Garmin GMR model radars.Enabling Timed TransmitSelect Radar > Sentry > Menu > Sentry Setup > TimedTransmit > On.Setting the Standby and Transmit TimesBefore you can set the standby and transmit times, you mustenable timed transmit (Enabling Timed Transmit).To help conserve power, you can indicate the radar standbytime and the transmit time to implement periodic radar signaltransmissions at set intervals.1 From the sentry screen, select Menu > Sentry Setup.2 Select Stdby Time.3 Enter the time interval between radar signal transmissions.4 Select Transmit Time.5 Enter the duration of each radar signal transmission.Enabling a Guard ZoneSelect Radar > Sentry > Menu > Sentry Setup > EnableGuard Zone.Defining a Circular Guard ZoneBefore you can define the boundaries of the guard zone, youmust enable a guard zone (Enabling a Guard Zone).You can define a circular guard zone that completelyencompasses your boat.1 Select Radar > Sentry > Menu > Sentry Setup > AdjustGuard Zone > Adjust Guard Zone > Circle.2 Select the location of the outer guard zone circle.3 Select the location of the inner guard zone circle to define thewidth of the guard zone.Defining a Partial Guard ZoneYou can define the boundaries of a guard zone that does notcompletely encompass your boat.1 Select Radar > Sentry > Menu > Sentry Setup > AdjustGuard Zone > Adjust Guard Zone > Corner 1.2 Touch and drag the location of the outer guard-zone cornerÀ.3 Select Corner 2.4 Touch the location of the inner guard-zone corner Á to definethe width of the guard zone.Radar Targeting and MARPARadar targeting enables you to identify and track objects.Mini-automatic radar plotting aid (MARPA) is primarily used forcollision avoidance. To use MARPA, you assign a MARPA tagto a target. The radar system automatically tracks the taggedobject and provides you with information about the object,including the range, bearing, speed, GPS heading, nearestapproach, and time to nearest approach. MARPA indicates thestatus of each tagged object (acquiring, lost, tracking, orRadar 21