General Dynamics Mission Systems is on schedule to complete production of the first Block I Knifefish unmanned undersea vehicles this year and finish updating the retrofitted systems in 2023. The company has delivered two systems to the Navy at the Block 0 configuration, according to Paul Dalton, vice president of undersea systems at General Dynamics Mission Systems. Three systems are currently being built to Block I and the two Block 0 systems will be upgraded to Block I next year,...