PT Timah Tbk is a tin mining company that uses bucket-type dredgers for offshore mining. These dredgers excavate tin ore material from the seabed, including in situ material, overburden, and ore. In 2022-2023, the Kapal Keruk 21 Singkep 1 operated in the Laut Air Kantung, Bangka, using jigs to separate valuable minerals during the tin ore washing process. However, the recovery results for both …