One of the interesting scenes in the short video shared by the Ministry of National Defense on the AKYA National Heavy Torpedo firing test in March 2022 was that the first submarine of the REİS Class, TCG PiriReis (S-330), was seen during maintenance at the floating dock. Work on the PiriReis Submarine, which was taken from the construction hall to the floating dock in December 2019 and launched on March 22, 2021, had not yet been completed as of March 21, 2022. However, for PiriReis to be delivered in 2022, the Sea Acceptance Tests (SAT) had to be started. The construction, outfitting, FAT, HAT, and SAT activities of each REİS Class Submarine take a total of 62 months. Following the completion of the outfitting activities of the PiriReis Submarine, it was planned to undergo Factory Acceptance (FAT), Harbor Acceptance (HAT), and Sea Acceptance (SAT) Tests, respectively. It was previously announced that HAT activities would take 9 months and SAT activities would take 11 months. The delay was announced on the official website of the Turkish Naval Forces Command, and it was stated that the first submarine would be delivered in 2023, not in 2022 as previously planned. "The construction of the first ship, PiriReis Submarine, started on September 28, 2015. Construction activities for the submarines continue, and they are planned to enter service after 2023, respectively. REİS Class Submarines will be the first submarines of the Turkish Naval Forces with an air-independent propulsion (AIP) system."

Meanwhile, in the Press Information Note published by the Presidency of Defense Industries on May 23, it was stated that the PiriReis Submarine is expected to be commissioned in 2022. "Within the scope of the project, the first submarine PiriReis, which is under construction at Gölcük Naval Shipyard, is planned to be commissioned this year. It is planned that our HızırReis submarine, which has been towed to the floating dock today, will be commissioned in 2023 and SelmanReis in 2027. From this year on, one submarine will be commissioned every year, and until 2027, 6 New Type Submarines will be delivered to our Navy. Submarine Delivery Dates: PiriReis 2022, HızırReis 2023, MuratReis 2024, AydınReis 2025, SeydiAliReis 2026 and SelmanReis 2027."