Kongsberg Seapath 320, Installation Manual, Page: 13 / 152

Installation Manual
M300-62/rev.2 XIII
Terminology
Alignment Is the process of adjusting the current internal navigation frame
in the instrument to the true external frame.
Antenna bracket Is the arrangement for mounting the GPS antennas
Antenna holder Is the arrangement on board the vessel for mounting the
antenna bracket to.
Attitude The orientation relative to the vertical axis of a vehicle.
Heading is not included. If heading is included, the word
"orientation" is used for the vehicle.
Beam The maximum width of the vessel at Main Deck level (B. mld)
Heading The direction of the main axis (bow direction) of the vehicle as
opposed to course, which is the direction of motion of the
vehicle. Yaw angle as defined here is the same as heading.
Heave The vertical dynamic motion of a vehicle and defined positive
down. Heave position and velocity are dynamic motion
variables oscillation around a mean value, typically zero.
Height The height in the Seapath product is defined as the vertical
position relative to the WGS84 datum (rotational ellipsoid).
Host system In this manual defined as Navigation computers, Dynamic
Positioning Systems, etc., receiving data from Seapath.
Origin The zero point in the coordinate system. The origin is the
intersection point between AP, BL and CL.
P-axis This axis is fixed in the vehicle, and points in the starboard
direction horizontally when the roll angle is zero. Positive
rotation about this axis is bow of the vehicle up.
Pitch A rotation about the pitch axis is positive when the bow moves
up. Normally, pitch means the dynamic pitch angle motions.
R-axis This axis is fixed in the vehicle, and points in the forward
direction horizontally when the pitch angle is zero. Positive
rotation about this axis is starboard side of the vehicle down.
Roll A rotation about the roll axis is positive when starboard side of
the vehicle moves down. Normally, roll means the dynamic roll
angle motion.
Starboard When looking in the bow direction of a vehicle, this is the right
hand side of the vehicle.
Surge The alongship dynamic motion of a vehicle and defined
positive forward.