The Navy's latest budget proposes substantial investments in submarine production and sustainment as the service looks to cut down on maintenance delays, ramp up deliveries of Virginia- and Columbia-class boats and prepare to deliver on a new agreement between the U.S., U.K. and Australia to supply the latter country with nuclear-powered subs. The service’s fiscal year 2024 budget request looks to alleviate fleet-wide maintenance delays with $13.9 billion to fund 75 ship availabilities across public and private yards and additional...