HMS Bat was a Palmer-built three funnel, 30 knot torpedo boat destroyer ordered by the Royal Navy under the 1895 – 1896 Naval Estimates. She was the third ship to carry this name since it was introduced in 1815 for a revenue cutter in service until 1848. Bat was classified along with similar vessels as a C-class destroyer in 1913.

The C class as designated in 1913 was a heterogeneous group of torpedo boat destroyers (TBDs) built for the Royal Navy in the late-1890s. They were constructed to the individual designs of their builders to meet Admiralty specifications. The uniting feature of the class was a top speed of 30 knots, a "turtleback" forecastle and that they all had three funnels. The funnels were spaced equidistantly and were of equal height, but the central one was thicker.