A gunboat is a naval watercraft designed for the express purpose of carrying one or more guns to bombard coastal targets, as opposed to those military craft designed for naval warfare, or for ferrying troops or supplies.
Bramble-class gunboat, built for the Royal Navy in 1886
A model of a type of decked "gun yawl" designed by Fredrik Henrik af Chapman and used by the Swedish archipelago fleet
The screw gunboat USS Alliance, circa 1880
Insect-class HMS Ladybird (with larger-calibre guns installed in 1939)
A frigate is a type of warship. In different eras, the roles and capabilities of ships classified as frigates have varied.
A sailing frigate of 1802. The French Penelope.
Baden-Württemberg, lead ship of her class of frigates of the German Navy, currently the biggest frigates worldwide.
Light frigate, circa 1675–1680
Boudeuse, of Louis Antoine de Bougainville