LONDON (Dow Jones)--Maritime tracking technologies developer Software Radio Technology PLC (SRT.LN) said Wednesday it has received more new orders for its AIS, or Automatic Identification System, products worth $2.1 million. The firm said the orders for its coastal tracking systems have been placed by various existing customers from different markets around the world. It didn't specify which customers these are. Software Radio Technology expects to deliver the units during the current fiscal year, which ends March 31. The firm's forward order book for products that are expected to be delivered in the current fiscal year totaled $5.7 million as at July 13. -By Hannah Benjamin, Dow Jones Newswires; 44-20-7842-9298; [email protected] (END) Dow Jones Newswires July 14, 2010 03:15 ET (07:15 GMT)