The entire weight of the harpoon--pole, shank, and head--should not exceed eighteen pounds.
The harpoon-line is from fifty to one hundred and fifty fathoms long, and is ordinarily what is known as "fifteen-thread line." At the end is sometimes fastened a buoy, and an ordinary mackerel-keg is generally used for this purpose.
In addition to the harpoon every swordfish fisherman carries a lance. This implement is precisely similar to a whaleman's lance, except that it is smaller, consisting of a lanceolate blade perhaps one inch wide and two inches long, upon the end of a shank of five-eighths-inch iron, perhaps two or three feet in length, fastened in the ordinary way upon a pole fifteen to eighteen feet in length.
The swordfish are always harpooned from the end of the bowsprit of a sailing-vessel. It is next to impossible to approach them in a small boat. All vessels regularly engaged in this fishery are supplied with a special apparatus called a "rest," or "pulpit," for the support of the harpooner as he stands on the bowsprit, and this is almost essential to success, although it is possible for an active man to harpoon a fish from this station without the aid of the ordinary framework. Not only the professional swordfish fisherman, but many mackerel-schooners and packets are supplied in this manner.
The swordfish never comes to the surface except in moderate, smooth weather. A vessel cruising in search of them proceeds to the fishing-ground, and cruises hither and thither wherever the abundance of small fish indicates that they ought to be found. Vessels which are met are hailed and asked whether any swordfish have been seen, and if tidings are thus obtained the ship's course is at once laid for the locality where they were last noticed. A man is always stationed at the masthead, where, with the keen eye which practice has given him, he can easily descry the telltale dorsal fins at a distance of two or three miles. When a fish has once been sighted, the watch "sings out," and the vessel is steered directly toward it. The skipper takes his place in the "pulpit" holding the pole in both hands by the small end, and directing the man at the wheel by voice and gesture how to steer. There is no difficulty in approaching the fish with a large vessel, although, as has already been remarked, they will not suffer a small boat to come near them. The vessel plows and swashes through the water, plunging its bowsprit into the waves without exciting their fears. Noises frighten them and drive them down. Although there would be no difficulty in bringing the end of a bowsprit directly over the fish, a skilful harpooner never waits for this. When the fish is from six to ten feet in front of the vessel it is struck. The harpoon is never thrown, the pole being too long. The strong arm of the harpooner punches the dart into the back of the fish, right at the side of the high dorsal fin, and the pole is withdrawn and fastened again to its place. When the dart has been fastened to the fish the line is allowed to run out as far as the fish will carry it, and is then passed in a small boat, which is towing at the stern. Two men jump into this, and pull in upon the line until the fish is brought in alongside; it is then killed with a whale-lance or a whale-spade, which is stuck into the gills.