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NorthStar Navigation NS3300 7-2-1 GPS navig ation da ta, 7-2 GPS steering mode

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Reference Manual

Destination

DTG (distance)

TTG (time)

BRG (bearing)

SOG (speed)

Course error (angle)

CTS (bearing)

Plotted course

Boat

XTE (distance)

Start

COG (bearing)

The autopilot has three ways of steer ing the boat, compass, GPS and wi nd. To select an appropriate

mode, see section 3-7. In GPS mode, the autopilot uses dat a from a GPS to steer the boat along a

route or to a waypoint.

7-2-1 GPS navig ation da ta

Navigating to a waypoint:

The boat is sailing from the star t to the destination and has moved of f the GPS plotted course from

the start to the destination:

BRG Bearing to destination

The bearing to the destinati on from the boat.

COG Course over ground

Direction in which the boat i s moving over the grou nd.

CE Course error

The difference betwee n CTS and the boat head ing.

CTS Course to steer

Optimum course to steer to retur n to the plotted cours e.

DTG Distance to go

Distance from the boat to the destination.

SOG Speed over ground

The current boat speed over t he ground. This is not n ecessarily th e same as the boat spe ed through the water n or the speed at which the boat

is approaching the destination.

TTG Time to go

The estimated time to reach the d estination.

XTE Cross track error

The distance from the boat to th e nearest point of th e plotted course. X TE may have a letter: R m eans steer to the righ t to return to the plotted

course, L means steer to the lef t.

7-2 GPS steering mode

Contents

Main Contents Page Page 1 Introduction Using this manual 1-1-1 Operat i n g modes 1-1 Autopilot Modes 1-1-2 St e e r ing m o des 1-1-3 Power steering modes 1-1-4 Turn modes 2 Quickstart 2-1 Starting the autopilot system 2-2 Using the autopilot to steer the boat automatically 2-3 Changing course during a voyage 2-4 Changing steering mode during a voya ge 2-5 Regaining manual control 2-6 Action in an emergency Page 3 Autopilot operation Button Function 3-1-1 AUTO key 3-1-2 STBY key 3-1-3 Dodge keys 3-1-4 Turn key 3-1-5 MODE key 3-3 Turnin g the NS3300 Pilot off 3-4 Backlight 3-5 Engaging autopilot 3-6 Disengaging autopilot 3-7 Se tting the steering mode 3-8-1 Changing course in compass mode 3-8 Changing course 3-8-2 Changing course in GPS mode 3-9-1 Dodging in compass mode 3-8-3 Changing set wind angle in wind mode 3-9 Dodge 3-9-2 Dodging in GPS mode 3-9-3 Dodging in wind mode 3-10 Turn modes Reference Manual 3-10-1 Auto tacking in compass mode A B 3-10-2 Turns in compa ss mode 3-10-3 Auto tackin g or gybing in wind mode Page 3-11 Power steering 3-12 A larms 3-12-1 The alarm w indow 3-12-2 Active alarms 3-12-3 Alarm history 3-12-4 Alarm details 3-13 Keylock 4 The displays 4-1 Display > Basic 4-2 Display > Pilot 4-3 Display > Compa ss 4-4 Display > Dat a 4-5 Display > Active alarms 5 Data headers 6 Menus 6-1 Setup > System 6-2 Setup > Profiles 6-3 Setup > Options 6-4 Setup > Vessel 6-5 Setup > A larms 6-6 Setup > Units 6-7 Setup > Comms 6-8 Setup > Calibrate Page 7 Steering modes 7-1 Compass steering mode 7-1-1 Compass steering data 7-1-2 Engaging and disengaging the autop ilot in compass mode Reference Manual 7-2-1 GPS navig ation da ta 7-2 GPS steering mode 7-2-2 Engaging and disengaging the au topilot in GPS mode 7-2-3 Arriving at waypoints 7-2-4 GPS gai n Boat heading 7-3-1 Wind steering data 7-3 Wind steering mode 7-3-2 True and apparent wind speed and direction 7-3-3 Engaging the autopilot in wind mode Page 8 Optimizing steering performance 8-1 Steering parameters 8-2 Profiles 8-3 Adjusting the steering parameters Page 9 Troubleshooting 10 Sp ec i fi ca ti on s