Save your ship blueprint at an Anchor before you take it into a fight. If the ship sinks in Isles of Abyss: RaidZone, place that saved blueprint to summon the build again. Without a saved blueprint, the game only gives you the ship in its initial state. Anything stored aboard the sunken ship is gone.

That rule is specific to Isles of Abyss: RaidZone, the PvP version of the ocean scenario. The standard Isles of Abyss server uses the same ship-building theme, but the developer only confirms player-caused ship destruction and blueprint recovery for RaidZone.

Save at the Anchor after every serious upgrade

Do not wait until the ship feels finished. Save a fresh blueprint at the Anchor after adding a better hull, propulsion, weapons or another upgrade you would hate to rebuild.

The saved blueprint records the ship you can bring back later. Once Human also says saving the blueprint at the Anchor raises the ship's total HP. That makes the save part of the build itself, not paperwork to leave until the end.

An old blueprint can still rescue you, but it restores the older design. If you rebuild half the deck, add expensive facilities and sail off without saving again, those changes are not covered by the earlier snapshot.

Four player-built ship designs sailing in Once Human Isles of Abyss
Image: NetEase Games.

Place the saved blueprint after the ship sinks

A RaidZone ship sinks when its total HP reaches zero. To recover it, return to ship placement and place the blueprint you saved at the Anchor. The restored vessel uses that saved design rather than the wreck that just disappeared beneath you.

The official instructions do not publish a separate recovery button or a special repair quest. The recovery method is the blueprint. Look for your saved ship design in the placement interface and use the newest version you recorded.

Your cargo does not come back

The blueprint restores the design, not the supplies that were sitting on board. Once Human explicitly warns that cargo on a sunken ship is not refunded.

Move rare materials and anything you cannot replace easily before picking a fight. A mobile base is useful right up until it becomes a loot-filled submarine. Carry what the run needs and leave the rest somewhere safer.

If only the starter ship returns

Getting the initial ship back means the game has no saved blueprint it can use for that build. Check that you are in Isles of Abyss: RaidZone, then look for the last ship design saved at an Anchor. A normal design-layout save made elsewhere is not confirmed as the same RaidZone recovery checkpoint.

If your saved Anchor blueprint is visible but will not place, do not keep spending materials on guesses. Record the server, platform and blueprint name, then report the placement failure through Once Human support. The confirmed recovery rule is simple: save at the Anchor, place that saved blueprint after a sinking, and treat every item left aboard as lost.