If the disembarkation is to be performed in front of the enemy, some of the pieces should be so placed that they can be disembarked immediately with their carriages, implements, and ammunition; also the tools and materials for throwing up temporary intrenchments on landing.
When there are several vessels laden with artillery and stores for the expedition, each vessel should have on each quarter and on a single masthead a number that can be easily distinguished at a distance. The same number should be entered on the list of supplies shipped in each vessel. The commander can then know exactly what resources he has with him. Some vessels, distinguished by particular signal, should be laden solely with such powder and ammunition as may not be required for immediate service of the pieces.
If it is necessary to reship or leave any articles on board the vessels, care should be taken to note them on the list.
Boats of proper capacity must be provided for the disembarkation, according to the circumstances in each case.
It may be necessary to establish temporary wharves on trestles, or to erect shears, cranes, or derricks.
RAILROAD TRANSPORTATION.
The most suitable car for carrying horses, especially in warm weather, is the "slat stock-car," built of slats and open all around, but tight in roof. Another kind, known as the "combination car," is made with five doors on each side and one at each end, which may be closed tight for stores, or with iron grates when carrying horses. These are suitable for either warm or cold weather.
Both kinds are usually from 28 to 30 feet long, 7 feet 9 inches wide, and 6 feet 8 inches high, inside measurement. Each car will carry 16 artillery or 18 common horses or mules. Be careful to have floors sanded to keep horses from slipping down.