Naval Historywith Dr. Alex

Q&A · 1:55:09-1:55:47

Why the Royal Navy retained its 4.5-inch gun

Institutional attachment and procurement inertia kept the British 4.5-inch gun in service even when a 155 mm NATO-standard weapon might have simplified land-fire support.

4.5-inch GunsNaval GunneryNaval ProcurementStandardisation
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Question

Why did the Royal Navy retain the 4.5-inch gun instead of adopting the NATO-standard 155 mm calibre?

Short answer

Long institutional attachment to the British 4.5-inch system produced a mix of procurement inertia and national preference.

Notes

Britain retained the 4.5-inch gun instead of moving to the NATO-standard 155 mm calibre for naval gunfire support. The answer is institutional rather than ballistic: the Royal Navy had used 4.5-inch weapons for a long time and regarded the calibre as its own. Existing experience and attachment therefore outweighed the case for standardization. The decision is summarized as a mixture of patriotism and inertia, a useful reminder that weapon choices are shaped by organizations as well as technical performance.