Uploaded April 2014 | Updated September 2026, 37 minutes ago
Sailing School app apps.apple.com/app/sailing-school/id500663978
Isophase (Iso.): the duration of darkness is equal to the duration of the light at any length of cycle.
Group flashing (Gp.Fl.): in this cycle there is a combination of two or more groups of flashes in one cycle at regular intervals. For example (Gp.Fl. 3+5).
Occulting (Occ.): the duration of the light is always greater than the duration of darkness and appears at regular intervals.
Morse (Mo.(A)): in this pattern the light shows one short flash followed by a long one which is equivalent to the letter "A" in Morse code.
Alternating (Al.): this pattern is used for special applications where great caution is required.
In this case the light alternates color, for example Al.W.R..
Long flashing (L.Fl.): in this pattern the light shows a long flash - at least 2 seconds in each period.
Sailing School app apps.apple.com/app/sailing-school/id500663978
Isophase (Iso.): the duration of darkness is equal to the duration of the light at any length of cycle.
Group flashing (Gp.Fl.): in this cycle there is a combination of two or more groups of flashes in one cycle at regular intervals. For example (Gp.Fl. 3+5).
Occulting (Occ.): the duration of the light is always greater than the duration of darkness and appears at regular intervals.
Morse (Mo.(A)): in this pattern the light shows one short flash followed by a long one which is equivalent to the letter "A" in Morse code.
Alternating (Al.): this pattern is used for special applications where great caution is required.
In this case the light alternates color, for example Al.W.R..
Long flashing (L.Fl.): in this pattern the light shows a long flash - at least 2 seconds in each period.
