Timber Load Lines.—The fines which indicate the maximum timber load fines in different circumstances and at different seasons are to be horizontal fines, 9 inches in length and 1 inch in breadth, which extend from, and are at right angles to, a vertical line marked 21 inches abaft the centre of the disc (see Figure 4). They are to be marked and verified similarly to the ordinary load lines (see Rules V to VII).
The Summer Timber Load Line is indicated by the upper edge of a line marked LS.
The Winter Timber Load Line is indicated by the upper edge of a line marked LW.
The Winter North Atlantic Timber Load Line is indicated by the upper edge of a line marked LWNA.
The Tropical Timber Load Line is indicated by the upper edge of a line marked LT.
The Fresh Water Timber Load Line in Summer is indicated by the upper edge of a line marked LF. The difference between the Fresh Water Timber load line in Summer and the Summer Timber load line is the allowance to be made for loading in fresh water at the other Timber load lines. The Fresh Water Timber load line in the Tropical Zone is indicated by the upper edge of a line marked LTF.(1)
Where seagoing steamers navigate a river or inland water, deeper loading is permitted corresponding to the weight of fuel, &c, required for consumption between the point of departure and the open sea.