NorthStar Navigation NS3300 manual True and apparent wind speed and direction, Boat at rest

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7-3-2 True and apparent wind speed and direction

Apparent wind speed and direction are the values measured on the boat. True wind speed and direction are the values after allowing for boat speed through the air.

If the boat is moving, then the apparent wind speed is different to the true wind speed and the apparent wind direction is different to the true wind direction, as shown below.

Boat at rest

True wind speed is the same as apparent wind speed and true wind direction is the same as apparent wind direction

Boat is at rest

Boat moving upwind

Apparent wind speed is greater than true wind speed

and apparent wind direction is closer to dead ahead than true wind direction

 

True

True

Apparent

 

Apparent

True wind

wind

Apparent

wind speed

wind speed

wind

speed

28 kts

direction

28 kts

wind

speed 20

20 kts

 

45º

 

direction

 

kts

 

 

 

 

 

 

30º

 

 

 

 

 

 

Boat

 

Boat

 

 

 

speed

 

speed

 

 

 

10 kts

 

10 kts

 

 

 

Boat moving downwind

Apparent wind speed is less than true wind speed and apparent wind direction is closer to dead ahead than true wind direction

True

 

Apparent wind

wind

True wind

speed 15 kts

speed

 

direction

 

20 kts

 

135º

 

 

 

 

 

Boat

 

 

speed

 

 

10 kts

Boat

 

 

speed

 

 

10 kts

 

 

True

Apparent wind

wind

speed

speed 15 kts

20 kts

 

Apparent wind direction 107º

Reference Manual

37

 

Image 37
Contents Northstar NS3300 Pilot System Contents Steering modes Important Notice Cleaning and maintenance Using this manualAutopilot Modes 1Operating modes Steering modesTurn modes Power steering modesQuickstart Manually steering the boat from the boats helm Manually steering the boat using power steeringButton Autopilot operationFunction Auto key Mode keyStby key Dodge keysTurning the NS3300 Pilot off Setting the steering modeBacklight Engaging autopilotChanging course in GPS mode Changing course Changing course in compass modeDodging in compass mode Changing set wind angle in wind modeDodge Dodging in wind mode Dodging in GPS modeCTS Auto tacking in compass modeTurns in compass mode Auto tacking or gybing in wind mode Tack SWA is 90 or less Gybe SWA is more than There are four possibilities for auto tacking or gybingAlarms Power steeringActive alarms Alarm windowAlarm history Alarm detailsDisplay Basic DisplaysDisplay Pilot Display Compass Display Data Display Active alarmsData headers Data setupHeader menu SizeMenus Setup SystemSetup Options Setup ProfilesSetup Vessel Setup Units Setup AlarmsSetup Calibrate Setup CommsSetup Simulate Steering modes Compass steering mode1Compass steering data Press Hold Engaging and disengaging the autopilot in compass modeGPS navigation data GPS steering modeNavigating to a waypoint Engaging and disengaging the autopilot in GPS mode GPS gain Arriving at waypointsWind steering data Wind steering modeBoat at rest True and apparent wind speed and directionBoat moving upwind Boat moving downwindHandsteer Engaging the autopilot in wind modeWind gain Steering parameters Optimizing steering performanceProfiles Problem drifts off course to one side Adjusting the steering parametersProblem oscillations from side to side build up Problem boat oscillated around GPS course Problem drifts off GPS courseWhen sailing a straight course, the boat drifts off course TroubleshootingUnit will not turn on Autopilot makes too frequent course corrections10Specifications

NS3300 specifications

The NorthStar Navigation NS3300 is a powerful marine navigation system designed for both commercial and recreational vessels. It represents the pinnacle of marine technology, enabling sailors and captains to navigate with precision and confidence, regardless of conditions. The NS3300 is particularly renowned for its user-friendly interface, advanced features, and robust design, making it a favored choice among maritime professionals.

One of the standout features of the NS3300 is its integration of the Global Navigation Satellite System (GNSS). This technology provides accurate positioning by connecting to multiple satellites, ensuring seamless navigation even in remote areas where traditional navigation methods may fall short. With the support for GPS, GLONASS, and other satellite systems, users can expect high reliability and accuracy in determining their vessel's location.

The NS3300 is equipped with a high-resolution color display that makes information easily readable, even in direct sunlight. The touchscreen interface is intuitive and responsive, allowing for quick access to essential navigation data. Users can customize their screens according to their preferences, displaying the information that matters most to them, including charts, routes, and environmental data.

Another critical aspect of the NS3300 is its advanced chart plotting capabilities. The system supports various digital chart formats, allowing users to integrate their preferred charts seamlessly. The built-in electronic chart display functionality helps in visualizing navigation routes and identifying potential hazards, ensuring safer passage through busy waterways.

The NS3300 also features connectivity options that enhance its functionality. With support for Wi-Fi, Bluetooth, and NMEA 2000 protocols, users can connect the NS3300 to other onboard systems, such as radar, sonar, and autopilot systems. This interoperability allows for a more integrated approach to navigation, providing a comprehensive overview of the vessel's environment.

Moreover, the NS3300 comes with robust weather information capabilities. It can receive real-time meteorological data, enabling captains to make informed decisions based on changing weather conditions. This feature is invaluable for both safety and route planning.

In conclusion, the NorthStar Navigation NS3300 is a sophisticated marine navigation system that combines state-of-the-art technologies and user-centric design. Its precise positioning capabilities, advanced chart plotting, connectivity features, and real-time weather information make it an essential tool for anyone venturing onto the water. Whether for commercial fishing, leisure sailing, or shipping, the NS3300 stands out as a reliable and efficient navigation solution. By integrating cutting-edge technology with usability, it empowers mariners to navigate with confidence and assurance.