Submarines
Attack submarines (Diesel-Electric)
Type 214 (Papanikolis) LOA 213′ / 64.9 m TDISP 1,860 tons submerged (4 active, service since 2010)



Type 209 1100 LOA 177′ / 53.9 m TDISP 1,207 tons and 1200 classes LOA 183′ / 55.8 m TDISP 1,285 tons (8 built, 7 active, service since 1971) one unit HS Okeanos S-118 has been upgraded with Air Independent Propulsion (AIP) and lengthened to about 203′ / 61.9 m.