Pint a limited extent in Commonwealth nations. In the United States, two pints are used: a liquid pint (≈ 473 ml) and a less-common dry pint (≈ 551 ml). Each of these pints is one-eighth of its respective gallon, but the gallons differ. This difference dates back to 1824, when the British Weights and Measures Act standardised various liquid measures throughout the British Empire, while the United States continued to use the earlier English measure. The imperial pint consists of 20 imperial fluid ounces and the US liquid pint is 16 US fluid ounces, making the imperial fluid ounce about 4%
Gills Bay more common, this area having one of the largest British populations, however the common seal is also present. Wild dogs are often spotted around the Gills area which are believed to have come across on the ferry from Orkney. Porpoises can be seen all year round in all parts of the firth and at Gills Bay as they tend to favour shallower water. Usually seen singly or in small numbers although in the autumn many large groups may be seen in Gills Bay where they congregate. Basking sharks are rare but are being seen more often around May to August.