I propose with this website to share all the learning derived from my studies in radio communications. It is my humble contribution to the world of Radio. Delta · Romeo · Zulu is not a niche website whose purpose is to take you to Amazon and live on commissions for the sale of products generated by affiliate links. Although the theme may be suspected as a niche, here I will not sell you anything; The sole purpose of this website is to promote clear information on scientific and technological advances associated with Radiocommunications. Search and rescue. Performance standards, maintenance requirements, and relevant procedures for radio and operational communications equipment with a special focus on maritime security, including the Global Maritime Distress and Safety System (GMDSS).