User manual MAGELLAN NAV DLX-10

[. . . ] Never rely solely on one device for navigating. USE CARE The Global Positioning System (GPS) is operated by the U. S. Government, which is solely responsible for its accuracy and maintenance. The accuracy of position fixes can be affected by the periodic adjustments to GPS satellites made by the U. S. Government and is subject to change in accordance with the Department of Defense civil GPS user policy and the Federal Radionavigation Plan. USE CAUTION Accuracy can be affected by poor satellite geometry. [. . . ] Default setting: 20 Setting Time Reference Contrast In order for the receiver to locate satellites and compute position fixes within a short period of time (less than 1 minute), it must have the correct UTC (Universal Time Coordinates or Greenwich Mean Time in Greenwich, England) time and date. If you are unsure about the UTC time/date, do not enter UTC time/date during initialization. Simply wait about 6 minutes and the unit will automatically get the UTC time/ date from the satellites and then compute a position fix. Press the Aux softkey, highlight General Setup using the CURSOR KEY and press ENTER. Highlight UTC Date and press ENTER to display a window showing the current UTC date. Use the CURSOR KEY to select numbers and move between day, month and year. A window opens that shows the current UTC time. UTC Date 01/24/96 Time can be referenced to either Universal Time Coordinates (UTC, Greenwich Mean Time in Greenwich, England) or local time. For local time, you must enter the hourly offset from UTC to Local (local minus UTC). Press the Aux softkey, highlight General UTC Setup using the CURSOR KEY, press ENLocal TER, highlight Time Reference, press ENTER and a window opens that lists UTC, Local. If local is chosen, use the CURSOR KEY to input Local Offset in hours and press ENTER. Press ESC to exit. Magellan NAV DLX-10/NAV 6510 UTC Time 22:08:18 Use the CURSOR KEY to select numbers and move between hours, minutes and seconds. Press the Aux softkey, use the CURSOR KEY to highlight Navigation Setup and press ENTER. Use the CURSOR KEY to highlight the desired map datum and ENTER to set. Default setting: WGS 1984 Selecting North Reference CURSOR KEY to highlight True or Auto Mag. Default setting: Auto Mag. Selecting Map Orientation When navigating on the map, there are two methods of orienting the map and the boat icon. When Map Orientation is set to North Up, the boat icon rotates according to its COG direction, with respect to north; the map does not rotate. North Up Track Up When Map Orientation is set to Track-Up, the boat icon always points up while the map rotates so the top of the screen is always the COG direction. The map rotates every time COG changes more than the specified number of degrees set. Press the Aux softkey, highlight Navigation Setup using the CURSOR KEY, press ENTER, highlight Map Orientation using the CURSOR KEY, and press ENTER. Use the CURSOR KEY to highlight North Up or Track Up and press ENTER to accept. If Track Up is selected, the resolution of rotation must be entered (the default is 10°). Default setting: North Up Direction related information such as COG, BRG, CTS and Set can be referenced to True North or Magnetic North (Auto Mag. ). Press the Aux softkey, highlight Navigation Setup using CURSOR KEY, press ENTER, highlight North Reference using the True Mag. [. . . ] The direction in degrees from the start waypoint of a course line to its destination. The optimum direction the vessel should be steered in order to efficiently make headway back to the courseline while also proceeding toward the destination waypoint. It is a "compromise" course bearing that projects from your current position to a point on the courseline mid-way between a point perpendicular to your position and the current leg destination waypoint. Datum Refers to the theoretical mathematical model of the earth's sea level surface. [. . . ]