Their only weapons were the bow, adzes, and wooden harpoons. The Aleuts hunted small sea mammals with barbed darts and harpoons slung from throwing boards. They wielded spears, clubs, harpoons, bows and slings. Tiny microliths were developed for hafting onto harpoons and spears. At first slow whales were caught by men hurling harpoons from small open boats. Such hunting is carried out with harpoons, gillnets, and set traps. It also possesses 12 weapons, ranging from napalm, pulse cannons, harpoons and rockets. However the use of fish-hooks, harpoons, and nets and sinkers was fairly widespread. They are typically caught with nets, trawls, and harpoons. Nearly all of the countries involved in whaling make use of explosive harpoons. Initially, whales were taken by means of hand harpoons and small boats. Spearfishing with barbed poles (harpoons) was widespread in palaeolithic times. They invented the earliest known harpoons using reindeer horn. Logs of old whaler ships indicated the designs and the markings of harpoons. There was a rich bone industry, including harpoons and fish hooks.