Manual Input, Position Correction, and Course/Speed Corrections (DR/Manual Input)

Manual Input and Position Correction is designed for manual entry of navigational data and input of permanent corrections to course and speed through water.

Menu path
→ → DR/Manual Input

Manual Input

Manual Input is designed for entering:

• Coordinates (manual input or manual observations)

• Course

• Speed through water

When coordinates, course, or speed are entered manually, ECDIS uses the data entered by the navigating officer in calculations. Data entered by the navigating officer has a higher priority, so navigational sensor data is ignored.

Tip

Manual coordinate input is recommended for entering positions obtained by astronomical methods or from external sources.

Manual course and speed input is recommended when the data link is damaged, the sensor has failed, and course and speed are determined by other means.

In the navigational indicator, manually entered data is displayed in yellow, with the data source shown as MAN.

Data Correction

To compensate for a systematic error in the navigational data received by ECDIS, use permanent coordinate correction (LAT/LON).

When a systematic compass error (instantaneous or constant) is identified, it is recommended to use the course (Course) correction.

When a speed sensor output error is detected, it is recommended to use the speed (Speed) correction.

Entered corrections are automatically applied by ECDIS.

Correction values are displayed in the navigational indicator, to the right of the corrected parameter values.

№	Element	Description
1	Compass correction	Display of the set course (compass) correction
2	Speed sensor correction	Display of the set speed correction
3	Latitude correction	Display of the set latitude correction
4	Longitude correction	Display of the set longitude correction

Important

ECDIS does not monitor the need to cancel coordinate, course, and speed corrections, due to the absence of comparison criteria.

ECDIS does not terminate coordinate, course, and speed corrections based on time.

The need to enable or disable coordinate, course, and speed corrections is determined only by the navigating officer, based on current conditions and circumstances.