Two ships of the British Royal Navy were named HMS TB 4.
- a first-class, -type, torpedo boat, built by John I. Thornycroft & Company and launched in 1879. Sold for commercial use in 1905 and renamed Rocket. Scrapped 1920. - a built by J. Samuel White with the name Sandfly and launched on 30 October 1906. Reclassified as a torpedo boat and renamed TB 4 in December 1906. Ran aground on the way to be scrapped on 11 January 1921 and broken up in situ. Citations
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