What is the depth at which a category 1 automatic float-free EPIRB activates?

What is the depth at which a category 1 automatic float-free EPIRB activates?

• A. 10 FEET
• B. 12 FEET
• C. 13 FEET
• D. 15 FEET

Answer: (C)

Category I automatic float-free EPIRBs use a hydrostatic release mechanism that frees the beacon when the mounting bracket is submerged to a specific depth. That depth is about four meters, roughly 13 feet. When the vessel sinks to that depth, the release triggers, the EPIRB floats free, and it then activates automatically upon water contact to begin transmitting the distress signal. This setup keeps the beacon away from a sinking hull and ensures it starts transmitting as early as possible. The other depths listed would either release too early or too late for reliable performance, so 13 feet is the standard activation depth.

Category I automatic float-free EPIRBs use a hydrostatic release mechanism that frees the beacon when the mounting bracket is submerged to a specific depth. That depth is about four meters, roughly 13 feet. When the vessel sinks to that depth, the release triggers, the EPIRB floats free, and it then activates automatically upon water contact to begin transmitting the distress signal. This setup keeps the beacon away from a sinking hull and ensures it starts transmitting as early as possible. The other depths listed would either release too early or too late for reliable performance, so 13 feet is the standard activation depth.