Airmen 1.15.4 is a mostly under-the-hood update with no flashy features. The most apparent new feature this update changes explosions to stick to ships they explode on. Previously, projectiles would explode and remain stationary in space as they fade so a crew on a fast moving ship could barely notice the effects. Now, a well place volley barrage can easily obscure an enemy captain's vision.
Explosion effects now stick to ships instead of being left behind as they move.
Added rocks to high tide and spine.
Reworked the part orphaning algorithm and networked projectile damage systems to reduce server load.
Fixed a bug where the player camera would be oddly positioned for a few frames while mounting or dismount a turret.
Fixed 3rd person turret bodies not immediately being in the proper position when they appear.
Fixed projectile damage/distance falloff applying after damage reduction instead of before.