Coastal Navigation

Navigational Algorithms

About this app

Coastal Navigation
Lines of position: bearing, range, horizontal angle.
Plot on Google Maps.

OPERATION
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1 - Select the type of coastal line of position: [Bearing], [Range] or [Horizontal angle].
2 - Enter its value.
3 - (Long click) the point/s of the sight.
Then the app plots the LoP on the map.

You can check the accuracy of your observations against GNSS

Permissions:
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- Location App permission must be allowed
- WRITE_EXTERNAL_STORAGE

Map controls and gestures:
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GPS location
- Switch on your GPS, and then automatic location detection is possible
- Push My Location button

Zoom
- Zoom buttons +/-
- Double tap to increase the zoom level by 1 (zoom in)
- Two finger tap to decrease the zoom level by 1 (zoom out)
- Two finger pinch/stretch
- One finger zooming by double tapping but not releasing on the second tap, and then sliding the finger up to zoom out, or down to zoom in

Scroll (pan)
- A user can pan around the map by dragging the map with their finger

Tilt
- A user can tilt the map by placing two fingers on the map and moving them down or up together to increase or decrease the tilt angle respectively

Rotate
- A user can rotate the map by placing two fingers on the map and applying a rotate motion.