Details Log - Furuno FCR-21x9-BB Operator's Manual

shown in the top part of the dialog, and a position symbol appears on the chart. In the
case of an EP, the letters EP are shown on the right side of the coordinates. If a valid
position estimate cannot be obtained, a message is displayed under the coordinates.
This may happen, for example, if the lines / circles have multiple crossings that are far
apart, or if two lines are nearly parallel or don't intersect at all. The accuracy limit (es-
timated standard error) is 1.0 NM. If the estimate is valid, the [Record] box can be
clicked to record the current position estimate in the [Voyage] log. Discrepancy be-
tween LOP result and ship position is also recorded in the log (this information may be
viewed by Info query on the position event symbol on the chart - which is displayed if
position event display is on in chart display settings).
Time transfer: If the observations are not simultaneous, they should be transferred to
a common time. Transferring is based on dead reckoning of ship movement. If a po-
sition line (or ring) is transferred, the letters TPL are shown beside its timestamp on
the chart. The method of transfer may be selected in the bottom of the dialog. Trans-
fer to latest transfers the measurements as if they were all made at the time of the
newest measurement. Continuous transfer transfers all measurements to real time.
Transfer off can be used to check where the measurement origins are. The position
estimate and the record function follow the same logic, which means that Transfer off
shows a position that has no relevance and Transfer to latest sends an old position to
the [Voyage] log (timestamp in the log does not match the position).
If you are satisfied with the position shown in the latitude and longitude fields, then
click the [Record] button to save the position observation to the Voyage log. If you wish
you can also enter latitude and longitude values manually.
Timeouts: The observations cannot be used long after they were made because dead
reckoning is inaccurate.
19.2

Details Log

The [Details] log contains voyage information, recorded once per minute.
• Date
• Time
• Source: No. of unit which generated log
• Type: Type of position data
• Auto: Automatic input of position
• Latitude, Longitude: Position as output by selected sensor
• Align/NM, Align/°T: Range, bearing offset, if used
• SOG/kn: Speed over the ground
• COG/°T: Course over the ground
• HDG/°T: Heading
• CORR/°T: Gyro correction value, if used
19. RECORDING FUNCTIONS
19-3