sasplanet (free maps for opencpn) & may be some other apps
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8:11
SAS PLANET how to download satellite images free
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8:44
DSC decoding (marine distress calls + test) with yadd and sdr sharp
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11:46
OpenCPN : trouver et installer des cartes @VoilierMartineke
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19:18
aiscatcher (online,offline,server) + rtl sdr(ship tracking)
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6:54
Opencpn + phone gps (bluetooth)
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24:22
Make your own maps for Lowrance HDS
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12:07
Historical Aerials Ep. 5: Looking at Cities and a Nature Cove
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9:38