U.S. Coast Guard Selects Stratos Government Services to Deploy Ku-Band Communications Network. Stratos Government Services Inc. (SGSI), a wholly owned subsidiary of Inmarsat plc, today announced it was awarded a five-year Indefinite Delivery Indefinite Quantity (IDIQ) contract by the United States Coast Guard (USCG) on June 17, 2011 to provide USCG Large Cutter Connectivity. SGSI will provide the USCG with Ku-band satellite airtime, installation support, teleport equipment and service, Network Operations Center support and training.