Naval Historywith Dr. Alex

Q&A · 47:24

Royal Navy anti-submarine preparation between the wars

The panel argues that Britain did invest in ASW before the Second World War, but inherited ships, funding limits, and threat assessments shaped what it bought.

Anti-Submarine WarfareAsdicInterwar PeriodRoyal NavySloops
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Question

Why did the Royal Navy not invest more in anti-submarine warfare between the world wars?

Short answer

It invested substantially, but funding, inherited vessels, and a limited threat assessment constrained replacement and sloop construction.

Notes

The Royal Navy developed ASDIC, experimented with aircraft systems, stockpiled equipment, and fitted destroyers for anti-submarine work. It also entered the interwar period with numerous First World War sloops and other submarine hunters that could be retained or adapted for a time. By the early 1930s those inherited ships were wearing out, yet governments were reluctant to fund replacements even though sloops were relatively inexpensive. Threat assessments also mattered: Germany was forbidden submarines, Japan was not expected to wage a commerce war against Britain, and Italy could be contained within the Mediterranean. The principal missed opportunity was therefore a larger steady programme of new sloops before 1939, not a complete failure to invest in ASW knowledge.