Satellite communications provider Iridium Communications Inc. announced Tuesday that its Global Maritime Distress and Safety System (GMDSS) service officially went live on Friday, December 11, ending a monopoly held by rival Inmarsat and enhancing the integrity of global safety communications for seafarers globally.GMDSS is an internationally regulated service, governed by the International Maritime Organization's (IMO) Safety of Life at Sea (SOLAS) convention. It provides life-saving assistance to seafarers in distress and has required equipment on board more than 60…