| K | Katie Ann (GB) | (Kommodore Johnsen) (Russia) |
| K-21 (Russia) | Kavirondo (Kenya) | Kongechalup (Denmark) |
| Kadriga (Turkey) | KBV-238 (Sweden) | (Konig Albert) (Germany) (Germany) |
| Kaima (Finland) | Keenora (Canada) | (Konigen Carola) (Germany) |
| Kairu Type Midget Submarine (Japan) | Keewatin (USA) | Kopu (New Zealand) |
| Kaiser Franz Josef I (Austria) | Keihaslahti (Finland) | Koralle (Germany) |
| Kaiser Friedrich (Germany) | Keihassalmi (Finland) | Kossuth (Hungary) |
| Kaiser Wilhelm (Germany) | Keitele (Finland) | (Kotoshiro Maru 7) (Japan) |
| Kaiwo Maru (Japan) | Kelen (Hungary) | (Kotvio) (Finland) |
| Kajaani I (Finland) | Kemajuan (Malaysia) | Koura (New Zealand) |
| Kalakala (USA) | Kemi (Finland) | Kouta (Finland) |
| (Kallavesi) (Finland) | Kennet (GB) | (KP-1) (Poland) |
| Kalle Tihverainen (Finland) | Keno (Canada) | Krait (Australia) |
| (Kalundberg) (Denmark) | Kent (GB) | (Krali Petar I) (Yugoslavia) |
| Kanangra (Australia) | Kerne (GB) | Kranich (Germany) |
| (Kapduen) (South Georgia) | Kenya Jacaranda (GB) | Krasnyi Vyimpel (Russia) |
| Kapitan Meyer (Germany) | (Kerttu) (Finland) | Krassin (Russia) |
| Kapitein Kok (Netherlands) | Kidd (USA) | Krippen (Germany) |
| Karim (Egypt) | Kiel (Germany) | (Kristian & Ene) (Germany) |
| (Karis) (Denmark) | (Kimberley Male) (Australia) | Kronverk (Russia) |
| Karialankoski (Finland) | (Kind) (Sweden) | Kruzenshtern (Russia) |
| (Karl Brostrom) (Finland) | Kindly Light (GB) | KS8-1192 (Australia) |
| Karl Friedrich Steen (Germany) | Kingswear Castle (GB) | (Kuopio) (Finland) |
| (Karl-Heinz) (Germany) | Kipawo (Canada) | Kuparu (New Zealand) |
| (Karlsbad) (Germany) | (Kirsten Jul) (Germany) | Kurort Rathen (Germany) |
| (Karlstein) (Czech Republic) | Kittiwake (GB) | (Kurt) (USA) |
| Karna (Denmark) | Kitty (GB) | Kurt-Heinz (Germany) |
| (Karrakatta) (South Georgia) | Kiwi (Bangladesh) | Kvaernes (Norway) |
| (Karttula) (Finland) | (Klagenfurt) (Austria) | Kvarsita (Sweden) |
| Karya Sama (Australia) | Klaback (Sweden) | KW 19 (Germany) |
| Katahdin (USA) | (Klaus Heinrich Karstens) (Netherlands) | Kyle (Canada) |
| Kathleen & May (GB) | Klondike (Canada) | Kyles (GB) |
| Kathleen Gillett (Australia) | Knapp (USA) | Kyo Maru No. 2 (Japan) |
| (Kathlyn) (GB) | Knocker White (GB) | Kyrenia Ship (Cyprus) |
| (Kathryn & Elma) (USA) | Kojima (Japan) | (Kysten) (Norway) |
| Kathryn M. Lee (USA) | Kompas (Denmark) | Kysten I (Norway) |
