Furuno FEA-2107-BB Operator's Manual page 598

Appendix 1: Glossary of Terms
ELECTRONIC NAVIGATIONAL CHART (ENC)
The database held on the ship for use with ECDIS. The ENC is equivalent to new editions of paper charts, and may
contain additional supplementary nautical information in addition to that contained in the paper chart.
FORWARDING DISTANCE (F)
The distance which the ship moves straight after a rudder command. For further details, see Figure 2 on page AP-4.
"FROM WP"
The last passed waypoint. For further details, see Figure 1 on page AP-4.
HEADING (HDG)
The horizontal direction in which the longitudinal axis of a ship actually points or heads at any instant, expressed as
angular units from a reference direction, usually from 000º at the reference direction, clockwise through 360º (true,
magnetic or compass heading). For further details, see Figure 1 on page AP-4.
GREAT CIRCLE
The intersection of the surface of a sphere and a plane through its center.
MAGNETIC VARIATION
The angle between the magnetic and geographic meridians at any place, expressed in degrees and minutes east or
west to indicate the direction of magnetic north from true north.
"NEXT WP"
The waypoint after "TO WP".
OFF TRACK
Cross-track error (XTE) distance from intended track. For more information, see Figure 1 on page AP-4.
PLAN
The direction "From WP" to "To WP", a constant course on a rhumb line track or a varying course on a Great Circle
track. For further details, see Figure 1 on page AP-4.
AP-2