Changelog — 2.5.3-beta.1

Mining Submarine Improvements

• Redesigned the mining submarine with a lower, narrower profile to fit through its 6 × 6 tunnels, including diagonal movement.

• Extended the drill’s cutting reach beyond its collision boundary to prevent getting stuck between block layers.

• Added automatic slow forward movement while the drill is active.

• The submarine waits until the selected drilling area is clear before advancing.

• Enable Hold Position to drill without moving forward.

• Increased drilling speed to up to 12 blocks every 4 ticks, while preserving normal drops and protection checks.

• Improved depth holding when moving from water into an excavated tunnel.

• Reduced drilling particles and limited block-breaking audio to one sound per drilling cycle.

Validation

• Passed 18 automated tests, including mining and forward movement through walls in eight directions.

• Verified that mined materials enter cargo storage and that drilling maintains depth.