4), a taffrail one, which, however, is not as a rule used for speeds over 18 knots.
4 the shoe H is secured to the taffrail, and the rotator in the water is hooked to the eye of the spindle M by the hook D.
To enable the indications of the log register on the taffrail to be recorded in the chart room or any other part of the vessel as desired, a chart room electric register has been introduced.
Io) is a taffrail one, with bearings of hardened steel, and is intended to be slung or secured to the taffrail by a line; the gimbal pattern has a fitting for the deck.
In taffrail logs, the movement of the line owing to its length becomes spasmodic and jerky, increasing the vibration and friction; to obviate this a governor or fly-wheel is introduced, the hook of the tow line K (fig.
The two principal American taffrail logs are the Negus and Bliss (Messrs Norie and Wilson).
The Bliss resembles the Rocket log in shape, and is secured to the taffrail by a rope or slung.