High Quality Content by WIKIPEDIA articles! HNLMS Tijgerhaai (P336) was a Zwaardvisch-class submarine of the Royal Netherlands Navy during and after World War II. She was originally ordered as HMS Tarn (P326), a British T-class submarine, built by Vickers Armstrong, Barrow, but never saw service under that name. She would have been the only ship of the Royal Navy to bear the name Tarn.