Themes

Conflict and Change

• Introduction

• In Focus: 1900

• In Focus: World War One

• In Focus: Interwar

  • Surface Fleet

  • Submarines

  • Royal Marines

  • Fleet Air Arm

• In Focus: World War Two

• In Focus: Post War Conflict

• In Focus: Cold War Climate

• In Focus: Falklands and Beyond

• Special Exhibition: Falklands 25

Learning

• How To: Understand Propaganda

• Propaganda Image Galleries

• Education Project: Sea With Your Own Eyes

Preparations for war

Article Highlights

• Introduction

• Grampus Class

• T Class

Grampus Class

These were the first class of purpose-built minelaying submarines. The first boat built was HMS Porpoise in 1932, with several more constructed in the late 1930s. The mines were stored in a special gallery with a conveyor belt built into the outer casing. The need for this specialised type of submarine disappeared after torpedo tubes were eventually put into use for minelaying.

Related External Links

• Royal Navy Submarine Museum