Topic T5A2- Aids to Navigation (Buoys, Day Marks, Lights & Sound
Signals)
1) Buoys (Lateral System- Entering from sea)
a. Lighted Buoys (some have sound signals)
b. Can/Nun Buoys
c. Midchannel Buoys/Junction Buoys
d. Info/Regulatory
2) Daymarks
a. Fixed, Squares & Triangles
b. Ranges
3) Lights
a. On Buoys/Daymarks
i. Fixed
ii. Flashing
iii. Occulting
iv. Quick Flashing
v. ISO
vi. Morse Code “A” (midchannel)
b. Ashore/Fixed Structures
i. Ranges
ii. Lighthouses
iii. Bridges
4) Sound Signals
a. On Buoys/Daymarks
i. Bells, Whistles, Horns
b. On Land
i. Horns
c. On Bridges
i. Sirens??