Maritime non-commercial communications are performed using the equipment of Global Maritime Distress and Safety System (GMDSS), under the International Convention for the Safety of Life at Sea (SOLAS). This equipment includes numerous devices of different technologies, features and user interfaces, which every officer of the watch (OOW) must know how to use. Besides, the equipment, i.e., its technology has not changed significantly in the last 30 years. Therefore, the purpose of this research was to collect and analyze information on how often GMDSS devices are used and whether any modernization is needed. The main research method was a questionnaire survey intended for experienced officers. Each question, as well as the answers of the respondents, were analyzed in detail and presented graphically. The results of the survey analysis indicate that the VHF (Very High Frequency) radiotelephone, Navigational Telex (NAVTEX) receiver, and Enhanced Group Call (EGC) receiver are still very used, while Digital Selective Calling (DSC) devices and MF/HF (Medium Frequency/High Frequency) radios (telephone and telex) are almost unused onboard. Additionally, more than 80% of respondents believe that GMDSS needs modernization.

Recently, the International Association of Marine Aids to Navigation and Lighthouse Authorities (IALA) has developed VHF data exchange system (VDES). It is recognized as an efficient tool for the usage of the radio spectrum with applied new techniques in information transmission. The authors propose the possibilities of VDES to be integrated with Electronic Chart Display and Information system (ECDIS), performing as a single point for data acquisition and distribution for monitoring and processing in the ECDIS. VDES satellite link component is emphasized as a part which could extend the safety of navigation as well as possible VDES applications for future service. A completely new architecture is proposed to get efficient and reliable data path, especially in ship’s communications. VDES could become a key point in safe and secure communications with both terrestrial and satellite components, resulting in a new area of integration possibilities. The main role of VDES in ship communications could be in critical instances of the ship’s operation as well as distress situations.