Sealife Sea Dragon 1500F Instruction Manual page 25

Blinking and SOS mode
(Only applies to Sea Dragon 1500F, 2100SF and 2500F lights)
The Sea Dragon 1500F, 2100SF and 2500F lights include a
blinking and SOS mode for emergency signal purposes.
1) With the light in the OFF state, push and hold the power button
for 4 seconds.
2) Release the power button when the light starts blinking.
3) Push and release the power button to switch between 1 second
interval blinking and SOS Morris code signal.
4) Push and hold power button for 2 seconds to turn off light.
25