ILLUSTRATED STEP-BY-STEP
VISUAL SIGNAL: Aim safely, operate the shutter/trigger, transmit clear Morse and observe for acknowledgement. Follow bridge procedures and the actual lamp manual.
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1. What is an Aldis lamp?
A handheld signalling lamp used for visual communication, commonly by transmitting flashes in Morse code. Exact controls and operating details depend on the installed model.
👀 KNOW IT — KNOW THE LAMP
2. Basic operating sequence
1
Check the lamp, power source/battery condition and controls according to the manufacturer's instructions.
2
Position yourself safely with a clear view toward the intended station/target.
3
Aim the lamp and operate the shutter/trigger/control smoothly.
4
Transmit the required Morse signal with clear timing between dots and dashes.
5
Observe for acknowledgement/response and continue the approved signalling procedure.
Important: Use the vessel's communication procedures and the actual equipment manual for specific signals, ranges and controls.
💡 HOW TO SIGNAL — STEP BY STEP
3. Morse code quick reference
A ·−
B −···
C −·−·
D −··
E ·
F ··−·
G −−·
H ····
I ··
J ·−−−
K −·−
L ·−··
M −−
N −·
O −−−
P ·−−·
Q −−·−
R ·−·
S ···
T −
U ··−
V ···−
W ·−−
X −··−
Y −·−−
Z −−··
1 ·−−−−
2 ··−−−
3 ···−−
4 ····−
5 ·····
6 −····
7 −−···
8 −−−··
9 −−−−·
0 −−−−−
📡 TIPS — SEND CLEAR MORSE
🎯 VISUAL LEARNING • SEE IT • TRY IT • REMEMBER IT
4. Morse practice tool
Type a short message and use the conversion as a study aid.
5. Good practice / avoid
Good practice
Keep the lamp ready, maintain safe positioning, use clear Morse timing, and follow the vessel's approved communication procedure.
Avoid
Do not improvise critical signals, obstruct other bridge equipment, or rely on the lamp when another required communication method is mandated.