The Lenthall Baugh tide indicator is a circular compass like device made from a polished brass with a glass covering over a set of scales and table. The face is marked with 'THE LENTHALL-BAUGH / TIDE INDICATOR / PAT No 2451/10' and 'SOLE MAKERS / HEATH & Co Ltd / CRAYFORD LONDON'. The scales on the face of the instrument consists of an outer circular scale, marked '0:45' left and right in centimetre increments, which can be rotated using the knurled brass knob mounted to the side of the indicators body. An arrow labelled, 'HALF MEAN / SPRING RANGE' points to the circular scale. The the right of the face there is a semicircular concentric circle scale, marked in hours '1:4, 1:5, 1:6, 1:7 and 1:8', with 'HIGH WATER' at the top and 'LOW WATER' at the bottom. At the centre of the glass face there is a brass knob which when turned rotates an internal brass pointer, marked with 'TIDES 4:8'. The pointer runs along the semicircular gauge, indicating the height of the tide above the low-water level of the spring tide at any hour. The base of the indicator has a slightly larger disk with three holes on the top and sides for securing to a wall or panel.