Port and Starboard
(Red or Green)
FL 1.5s 0.3
301
FL 1.5s 0.5
303
FL 2s 0.3
305
FL 2s 0.4
306
FL 2s 0.5
307
FL 2.5s 0.5
311
FL 2.5s 1
312
FL 3s 0.3
314
FL 3s 0.5
316
FL 3s 1
318
FL 4s 0.3
320
FL 4s 0.5
322
FL 4s 1
325
FL 5s 0.3
328
FL 5s 0.5
329
FL 5s 1
331
FL 6s 0.5
336
FL 6s 1
338
FL 7s 1
340
FL 8s 0.5
344
FL 10s 0.3
347
FL 10s 0.5
348
FL 10s 1
350
FL 15s 1
354
Iso 2s
100
Iso 3s
101
Iso 4s
102
Iso 6s
104
Iso 8s
105
Iso 10s
106
FL(2+1) 6s 0.3
472
FL(2+1) 10s 0.5
473
FL(2+1) 12s 1
475
FL(2+1) 15s 1
476
Preferred Channel
(Red or Green)
North
Q 1s 0.3
601
Q 1s 0.5
603
VQ 0.6s 0.3
503
East
Q(3) 5s 0.5
614
Q(3) 10s 0.3
616
Q(3) 10s 0.5
618
VQ(3) 5s 0.3
509
South
Q(6) + LFI 15s 0.3
631
Q(6) + LFI 15s 0.6
633
VQ(6) + LFI 10s 0.3
516
West
Q(9) 15s 0.3
627
Q(9) 15s 0.6
629
VQ(9) 10s 0.3
513
Cardinals
(White)
Q1 0.3s
601
Q(2) 5s
608
Q(2) 6s
610
Q(2) 10s
612
Q(2) 15s
613
Q(3) 6s
615
Q(3) 10s
616
Q(3) 30s
620
Q(4) 6s
621
Q(4) 10s
623
Q(4) 12s
624
Q(4) 15s
625
Q(4) 20s
626
Q(9) 15s
629
Other -
Quick Flash
FL (5) 20s 0.5 1.5
470
FL (5) 20s 0.8
471
Single flash
See FL 1s to FL 8s
Group flash
See FL(4) to FL(5)
Special Mark
(Yellow)
Iso
See Iso 2s to Iso 10s
Mo(A)
803
OC 3s 2
201
OC 4s 3
205
OC 5s 4
207
OC 6s 5
211
OC 6s 4
209
OC 8s 6
214
OC 10s 7
217
OC 15s 10
220
LFI 10s 3
705
Safe Water
(White)
Fixed
000
Iso 2
100
Iso 4
102
Iso 6
104
Occu 4
205
FL2.5(0.3)
310
FL2.5(1)
312
FL4(0.4)
321
FL4(1)
325
FL5(0.5)
329
FL6(0.6)
337
FL6(1)
338
FL10(1)
350
FL15 (1)
354
FL(2)5
406
FL(2)6
416
FL(2+1)6
472
Q
601
Mo(A)
801
USCG
Flash Characters
FL(2) 4s 0.5
400
FL(2) 5s 1
408
FL(2) 6s 1
416
FL(2) 7s 1
418
FL(2) 8s 1
421
FL(2) 10s 1
428
FL(2) 12s 1
433
FL(2) 15s 1
435
FL(2) 20s 1
436
FL(2) 25s 1
437
FL(3) 6s 0.5
438
FL(3) 8s 0.5
440
FL(3) 10s 1
444
FL(3) 12s 1
448
FL(3) 15s 0.5
451
FL(3) 20s 1
455
FL(3) 30s 1
456
FL(4) 10s 0.5
458
FL(4) 12s 0.8
462
FL(4) 15s 1
464
FL(4) 20s 1.5
468
FL(4) 30s 0.5
469
FL(5) 20s 0.8
471
FL(2) 5s 0.5
407
FL(2) 5s 1
408
FL(2) 10s 0.5
423
FL(2) 10s 1
428
Other-
Very Quick Flash
Isolated Danger
(White)
Other -
Multi Flash
VQ 0.5s 0.2
501
VQ(2) 4s 0.2
504
Nautical
Range
(NM)
Intensity
(candela)
Code
Nautical Range
Flash Character
1
1
0001
2
5
0005
3
15
0015
4
37
0037
5
77
0077
Flash Character
Code
Flash Character
Code
Flash Character
Code
Flash Character
Code
The brightness of your beacon
will be determined by how far
away you want the light to
be seen (nautical range) or
the unit of measure for light
luminosity (candela).
On a map Nautical Range is
shown in the example below.
How your beacon flashes will be determined by what it is trying to
communicate or mark.
Identify what type of beacon you are setting up. A cardinal, preferred
channel marker or other marker will have a different flash character.
An example flash character is shown on the map below.
FINDING YOU FLASH CHARACTER CODE
FINDING YOUR
BRIGHTNESS CODE
