How can you make submarines stronger?

To make submarines stronger, advancements in materials science can be utilized to develop lighter, more durable hull materials, such as advanced composites or titanium alloys, which can withstand greater pressures at depth. Additionally, enhancing the structural design through improved engineering techniques can better distribute stress and prevent structural failures. Incorporating advanced technologies like reinforced bulkheads and better sonar systems can also enhance both the strength and stealth capabilities of submarines. Finally, regular maintenance and upgrades to critical systems ensure long-term resilience and operational effectiveness.