Build your survival plan around ports and supplies
Open World Survival in S.O.N.A.R. - Submarine Operators Not Actually Ready supports one to six players exploring a large ocean while keeping their submarine and crew going. Discover ports to buy resources and submarine upgrades, and earn money through enemy-ship encounters and treasure recovery. Your immediate goal is to connect those activities without neglecting the supplies and repairs that let the crew continue.
This S.O.N.A.R. survival mode guide covers that progression loop using the developer's October 27 Open World Survival announcement and full-release information. It is an overview of the confirmed systems, rather than a fixed route through every port.
Know what the open world adds
Survival is the game's longer-form exploration mode. The official announcement describes a large map with hidden dangers, discoveries, easter eggs, and an underwater day-and-night cycle. The October 29 launch announcement also lists it as part of the full game.
The important difference from planning around one campaign objective is that survival connects several ongoing needs:
- Exploration reveals more of the ocean and its opportunities.
- Ports provide places to buy resources and improve the submarine.
- Enemy ships and treasure provide ways to earn money.
- Crew care and damage control remain part of operating the vessel.
The developer advertises more than 100 hours of gameplay for the mode. Treat that as its description of the intended scale, not a timer you must satisfy or a guaranteed length for every run.
Use ports for resources and submarine upgrades
Finding a port is a meaningful progression step because it connects exploration with purchasing. The survival announcement specifically lists harbor outposts where you can obtain weapons, food, and medical resources. It also says that ports offer submarine upgrades.
When planning a visit, distinguish the crew's current needs from the improvements you want next:
| Need | Confirmed role in survival |
|---|---|
| Food | Helps support the crew during the voyage |
| Medical resources | Part of the essential supplies sold at harbor outposts |
| Weapons | Available to purchase at ports |
| Submarine upgrades | Improvements obtained through port visits |
As a planning choice, check what the crew needs to keep operating before committing all available money to an upgrade. That is resource-management advice, not a claim that the game enforces a particular purchase order. The published material does not establish a complete upgrade tree, fixed prices, or the best first upgrade for every crew.
Earn money through encounters and treasure
The official survival description identifies two money sources: hunting enemy ships and recovering treasure from the depths. Those options give exploration a purpose beyond simply traveling farther.
Discuss which activity your crew is preparing for. Pursuing an enemy ship calls attention to detection, movement, weapons, and possible damage control. A treasure outing centers the crew's attention on finding and recovering something valuable. Neither description establishes a universal best income rate, so choose an opportunity your crew is prepared to handle instead of assuming one activity is always the fastest way to earn money.
The announcement confirms that treasure recovery pays, but does not provide a complete recovery-control sequence or guaranteed treasure locations. Use the relevant in-game instruction for the actual recovery operation; the existence of treasure income alone is not a substitute for learning that station.
Keep the crew functioning between opportunities
The publisher's S.O.N.A.R. overview emphasizes food, rest, and general crew well-being. Neglect can leave the crew exhausted, seasick, or delirious. Navigation, diving, sonar, engineering, and damage control also remain distinct responsibilities aboard the submarine.
For a group, agree who is watching those responsibilities before everyone concentrates on an encounter or purchase. For a solo session, learn the stations in single-player Training and plan how you will move between them. Both approaches address the same practical problem: an exploration opportunity does not remove the vessel's other needs.
A useful rhythm is to review the crew's condition, choose the next exploration or money-making opportunity, and use discovered ports to address supplies and improvements. Adapt that plan to the condition of your current run rather than treating it as a scripted route.
FAQ
Can I play Survival alone?
Yes. The official mode description supports crews of one to six players, so a one-player survival session is supported.
Where do I buy submarine upgrades?
At ports. The official announcement identifies port visits as the way to obtain submarine upgrades, alongside buying essential resources.
How do I earn money in Survival?
The developer identifies hunting enemy ships and recovering treasure as money sources. The published announcement does not provide comparative earnings or a guaranteed farming route.
Is there a day-and-night cycle underwater?
Yes. The October 27 survival announcement explicitly includes a day-and-night cycle, even underwater.