Positioning; Direct Positioning Sensors; Dead Reckoning Equipment; Manual Correction - Furuno FEA-2807 Operator's Manual

2.3

Positioning

Positioning means using all available methods available to calculate and keep ship's position up-to-date during a
voyage.
The calculation of ship's position is based on available navigation sensors. The system integrates valid information
from different sensors and uses the Kalman filter technology for final position calculation.
Direct
positioning
sensors
Positioning
Manual
correction
2.3.1

Direct positioning sensors

Satellite navigation systems:
• GPS navigator
• GPS navigator with a differential correction, DGPS
• Local position-fixing systems
2.3.2

Dead reckoning equipment

Ship's heading measurement devices:
• Gyrocompass
• Magnetic compass (magnetic heading not appropriate
with the Track Control System)
• GPS gyrocompass
2.3.3

Manual correction

User-executed position correction where radar echoes and information from synthetic charts are combined and
verified by the operator, and adjusted if necessary.
Dead reck.
equipment
Radio navigation systems:
• Loran C
Speed measuring devices:
• Single-axis speed logs
• Dual-axis speed logs
• Radionavigation equipment
• Satellite navigation equipment
2. Navigation Tasks
2-3