Abstract
This article proposes a solution to enhance safe navigation at sea of AIS-equipped ships but not equipped with Electronic Chart Display Information System (ECDIS) by research implementation solutions a signal converter to transfer information from Automatically Identification System (AIS) to Electronic Navigational Chart (ENC). Experiments are conducted on small cargo ship of the 1st Regional Command - Viet Nam People Navy, this signal converert meets the requirements and is highly feasible.