The same diagram may show the angle of grid north ( the direction of the map's north-south grid lines ), which may differ from true north.
12.
The polar ice sheet is moving at a rate of roughly 10 metres per year in a direction between 37?and 40?west of grid north, down towards the Weddell Sea.
13.
True geodetic north differs from magnetic north ( the direction a compass points toward the magnetic north pole ), and from grid north ( the direction northwards along the grid lines of a map projection ).
14.
With few exceptions, within this grid north / south roads are designated as Courts, Roads, Avenues or Places ( often remembered by their acronym ), while east / west roads are Streets, Terraces, Drives or occasionally Ways.
15.
UPS grid north is arbitrarily defined as being along the prime meridian in the Antarctic and the 180th meridian in the Arctic; thus, east and west on the grids when moving directly away from the pole are along the 90�E and 90�W meridians respectively.
16.
The east-west and north-south X and Y axes are used for the LN3-2A . The accelerometer outputs torque the gyros in their sensitive axes, while the airplane is in flight, to maintain earth and grid north orientation of the stable platform through the platform gimbals.
17.
Maps issued by the United Kingdom Ordnance Survey contain a diagram showing the difference between true north, grid north, and magnetic north at a point on the sheet; the edges of the map are likely to follow grid directions rather than true, and the map will thus be truly rectangular / square.
18.
The computer is powered up and nulls its velocity shafts; the gyros are powered by 115V and 400 Hz and revving up; the platform is leveled in pitch, inner and outer roll relative to the aircraft using the gimbal synchrotransmitters; and the azimuth axis is driven to the grid north direction using the magnetic heading sensor.
19.
It is bounded roughly by Alaskan Way S . on the west, beyond which are the docks of Elliott Bay; by S . King Street on the south, beyond which is street grid north of Yesler does not line up with the neighborhood's other streets ( nor with the compass ), so the northern " border " of the district zigzags along numerous streets.
