PBR Mk I.jpg
en
PBR Mk I, PBR (Patrol Boat River) Mk I., PBR on patrol in Vietnam with its front facing twin, and rear facing single .50-caliber machine guns, and mid-ship 40 mm grenade launcher clearly visible
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en
PBR Mk I, Patrol Boat, River
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ja
PBR Mk I、PBR 、ベトナムの哨戒中のPBR、前面が双方向に、背面が.50口径機関銃1丁、ミッドシップ40mm弾発射器がはっきりと見える。
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ja
PBR Mk I、哨戒艇、リバー
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precariously balanced