Submarine Powered,Submarine Tracking Pinger,

摘要

The submarine powered,submarine tracking pinger (SP-STP) is designed to mount on submarines to allow the submarine to be accurately tracked by a sonar system. The SP-STP is synchronized to a master clock and produces a pulse every 10sec (or 5sec if desired). There are two SP-STP units,which differ only in the precision of each of the 1MHz oscillators. Unit one has an accuracy of 1part in 10to the minus 9th power and is the primary unit,and Unit two has an accuracy of 1part in 10to the minus 8th power and is the backup unit. (Author)