NorthStar Navigation Pilot System NS3300 - Manual (Page 36)

36
Northstar NS3300 Pilot
Boat heading
Course error, 10° to starboard
CTS (intended autopilot course, to achieve
the SWA [set wind angle])
SWA (set wind angle), 45°
Wind angle,
can be APP (apparent)
or TRUE
Wind
APP Apparent wind
angle The apparent wind angle at the boat. P in front of the angle means the wind is from port, S means that the wind is
from starboard.
CTS Course to steer The course to steer to maintain the SWA (set wind angle).
Course error The difference between APP (wind angle) and SWA (set wind angle).
SWA Set wind angle The desired wind angle.
TRUE True wind angle The true wind angle at the boat. P in front of the angle means the wind is from port, S means that the wind is
from starboard.
The autopilot has three ways of steering the boat, compass, GPS and wind. To select an
appropriate mode, see section 3-7. In wind mode, the autopilot steers the boat to a set angle to
the wind, called SWA (set wind angle).
7-3-1 Wind steering data
7-3 Wind steering mode