The use of bathing machines was part of the etiquette for sea-bathing to be observed by both men and women who wished to behave respectably.
The bathing machines in use in Margate, Kent, were described by Walley Chamberlain Oulton in 1805 as: [F]our-wheeled carriages, covered with canvas, and having at one end of them an umbrella of the same materials which is let down to the surface of the water, so that the bather descending from the machine by a few steps is concealed from the public view, whereby the most refined female is enabled to enjoy the advantages of the sea with the strictest delicacy.
Some resorts had wooden rails into the water for the wheels to roll on, and a few had bathing machines pulled in and out of the sea using cables propelled by a steam engine.
[6] Bathing machines would often be equipped with a small flag which could be raised by the bather as a signal to the driver that they were ready to return to shore.
Their structure is simple, but quite convenient; and by means of the umbrella, the pleasures of bathing may be enjoyed in so private a manner, as to be consistent with the strictest delicacy.
[10][11] According to a news report, "The queen's bathing machine was unusually ornate, with a front verandah and curtains which would conceal her until she had entered the water.
[13] However, in Aldeburgh, Suffolk, Eric Ravilious was able to paint bathing machines on wheels with winches still in use as late as 1938.