Underwater Expertise -- Offered by Pegasus, this system ports to Roblox the high-risk environment of combat and technical diving operations as utilized by real-world operators and free-divers. Featuring server-authoritative physiology with optimizations to reduce performance issues and excessive server loads, this system presents a finely-tuned and realistically sound take on the subsurface personnel operations constantly performed in theaters of war by real-world maritime specialists and operators. Modeling open-circuit gas, closed-circuit rebreathers, Bühlmann decompression, oxygen toxicity, narcosis, thermal exposure and recompression treatment, and created with special attention to military simulations and experiences based off of the latest developments in dive technology, this system fits perfectly into any complex military simulation enthusiast community with the providing of an efficient and multi-functional system for underwater personnel operations.