18. Appurtenances.—
A bill of sale or mortgage of the ship should describe the interest conveyed, either the whole or a fractional part, and include the appurtenances. These are covered by the usual phrase, "engines, boilers, machinery, masts, bowsprit, sails, boats, anchors, cables, and all other necessaries thereunto appertaining and belonging." Whatever is on board for the object of the voyage and belonging to the owners will ordinarily be included, like provisions, supplies, compasses, chronometers as well as new articles purchased for the ship but not yet installed on board. As in other cases of sales, the intention of the parties, so far as it can be ascertained, will control and it is desirable to have an inventory of separate articles in order to avoid misunderstandings or disputes.