Language barriers between officers and lascars made the use of translators very important. Very few worked on deck because of the language barrier. Some Europeans managed to become proficient in the languages of their crew. Skilled captains such as John Adolphus Pope became adept linguists and were able to give complicated orders to their lascar crew. Often native bosses known as "serangs", as well as "tindals" who often assisted serangs, were the only men able to communicate directly with the captain and were the men who often spoke for the lascars. Many lascars made attempts to learn English but few would have been able to talk at length to their European captains.