Photos from the Reis-class AIP Sub Brief (Patreon)

The Reis-class submarine is a non-nuclear, diesel-electric submarine. It is an advanced submarine design that incorporates various stealth features and advanced technology.  The Reis-class submarine features an air-independent propulsion (AIP) system, which allows it to operate for extended periods underwater without surfacing or snorkeling to recharge its batteries. This AIP system significantly increases the submarine's submerged endurance and stealth capabilities.

 It has a crew complement of around 27 to 35 personnel and can carry torpedoes, anti-ship missiles, and mines. The Reis-class submarine is designed for a wide range of missions, including anti-submarine warfare, anti-surface warfare, intelligence gathering, and special operations.