A Royal Marine in uniform who dived into the River Tamar from the Torpoint Ferry to rescue a woman has been hailed as a hero. But the rescuer left the scene without giving his details and an MoD spokesman said later he had requested that he should not be identified for operational reasons. The woman, who has not been named but who is in her 30s and from Torpoint, was travelling with her family, including her teenage daughter, on the ferry on Monday just before 8pm. After she plunged into the water, her daughter raised the alarm and the marine dived in with a lifejacket and kept the woman afloat until further help arrived. The crew of the ferry, which had just left Devonport, sent out a mayday call which was received by Brixham Coastguards who alerted an MoD police launch and the Plymouth lifeboat. The pair were picked up by the launch and taken ashore where the woman was given cardiopulmonary resuscitation (CPR) by police before being taken to hospital. A police spokesman said later that the modest marine's heroic efforts had undoubtedly saved the woman's life. He had been in uniform at the time but had left the scene without identifying himself. The woman was taken to Derriford Hospital, Plymouth, where she was treated for cuts and bruises.