Quote:
Originally Posted by Alexsej
When use stadimeter to calculate ship range it gives me shorter distance that really is. (compared to manually calculated distance by ruler on nav.map)
Am I doing something wrong here? 
I have somewhat experience with SH 3, SH4 and SH 5 so I am not a newbie 
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I think with both versions of LSH (5.1 and 2015) you need to double the mast height when you do your calculation. So, if the mast height is 21 meters, you align your measurement to 42.
It was like this in LSH5. You can prove it out by having your watch officer pick out a few ships nearby in port.