Aries Marine DAM 999
Knowledge Bank - Double Hull Conversion
 
Calculate Distance to the Horizon
The apparent intersection of the earth and sky as seen by an observer is called the Hirizon. This calculator enables you to find the distance to horizon.
   
Height of eye level feet meters
 
Distance to the Horizon:
Nautical Miles
Statute Miles
 
Calculation Method

Distance in Nautical Miles and Statute Miles of the visible sea horizon for various heights of eye in feet

D = Square Root( (2 * r0 * hf)/(6076.1 * B0) )

D is the distance to the horizon in nautical miles
r0 is the mean radius of the earth (3440.1 nautical miles)
hf is the height of eye in feet
B0 (0.8279) accounts for terrestrial refraction.

Formula simplifies to:

Distance in Nautical Miles: 1.169 * Square Root(hf)
Distance in Statute Miles: 1.346 * Square Root(hf)
Double Hull Conversion