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17
Apollo-155
Long Range Lantern Adjustable from 4-12nm+
Option 1: IALA Flash Characteristic Selection
• Click the “Flash Code” tab at the top of the Sealite Lantern Programmer
• From the “IALA Flash Characteristic Selection” box, select the desired IALA flash characteristic
class from the drop down field. Eg. FL
• Next select the desired flash timing interval from the subclass drop down field. Eg. FL 2 S will set
the lantern to flash ON & then OFF once within a 2sec interval
• Next select the specific ON & OFF flash timing setting from the drop down field. Eg. 20: 0.2, 1.8
will set the lantern to flash for 0.2sec ON & 1.8sec OFF
• Click the “Set Flash Code” button at the bottom of the page to send the new setup instruction to
the lantern
PLEASE NOTE
:
when selecting the IALA Flash Characteristic, fields in the “Sealite Flash
Characteristic” & “Custom Flash Code” fields below will populate with the particular information. Once
set, information about the selected flash code will also be updated in the “Existing Configuration” box.
IALA Flash Code Symbols
FL Flash followed by number Eg. FL 1 S represents one flash every second
F Fixed
Q
Quick flash
VQ Very quick flash
OC
Occulting; greater period ON than OFF
ISO
Isophase; equal period ON and OFF
LFL Long flash long
MO
Morse code ( ) contains letter
For example, VQ (6) + LFL 10 S represents 6 very quick flashes followed by a long flash, during a 10
second interval.
Recommended Rhythm for Flashing Light - IALA Regions A and B
MARK DESCRIPTION
RHYTHM
Port Hand & Starboard Marks:
Any, other than Composite Group Flashing (2+1)
Preferred Channel Starboard:
Composite Group Flashing (2+1)
Preferred Channel Port:
Composite Group Flashing (2+1)
North Cardinal Mark:
Very quick or quick
East Cardinal Mark:
Very quick (3) every 5 seconds or quick (3) every 10 seconds
South Cardinal Mark:
Very quick (6) + long flash every 10 seconds or quick (6) + long flash every 15 seconds
West Cardinal Mark:
Very quick (9) every 10 seconds or quick (9) every 15 seconds
Isolated Danger Mark:
Group flashing (2)
Safe Water Mark:
Isophase, occulting, one long flash every 10 seconds or Morse Code “A”
Special Marks:
Any, other than those described for Cardinal, Isolated Danger or Safe Water Marks