The embodiments herein provide a system and a method for automatic distress alerting at sea. In one example embodiment, a latching mechanism for an electronic module includes a latch, a latch return spring, and a release slide. In implementation of the distributed architecture, various component modules are placed in communication with the CPU module through at least one and preferably multiple communication busses. The present invention allows switching between these models. In one embodiment, a structure which comprises a pole tip of main pole exposed on the air bearing surface, a part which is recessed from the air bearing surface and having a tapered face at leading side against the air bearing surface, and a magnetic material connected thereto is adopted for the main pole.