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taking readings

Forum - Coastal Navigation - taking readings
Module Content - Sea Talks1
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Student
Ryan Oakes
Chapel Hill, NC, USA
Skipper Level II
Status: Sailor
Qualified days: 27
taking readings
Posted 2021, May 22 10:51
so in the example below regarding the lighthouse, marina and monument, I assume we add 180 degrees to the lighthouse bc we are directly South of the object but why do we subtract 180 and add 180 for the other two objects respectively?
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Student
Andrew Hecker
St Petersburg, FL, USA
Skipper Level II
Status: Sailor
Qualified days: 42
Reply 2023, Feb 23 23:41
Ryan - think about the bearing from the object. If the line of bearing "to" an object is 270 degrees, the bearing "from" that object to us will be 090. We use bearings "from" to construct our position estimate. Andy
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