Mornar, the club with the highest traditions of the school courses, started at the end of the 50’s sailing school at the time the first optimists in Croatia, made ​​in club workshop for maintenance and repair of small vessels led by the late Tonći Mitrovic. From then on, the existence of the club is based on the work of sailing and Ship-school, teaching children and young people and the existence of life at sea, and the development of sailing sport in general.

During all these years the club has gone over 3500 people, conveying the spirit of the club from generation to generation, so the team today brings together members under the age of 7 and older than 77 years.

Recently Mornarevu school courses are attended Mate Arapov, Tonci Stipanovic, Marin Misura, Karlo Krpeljević, Tonko Kuzmanic, Luka Mratovic, Luka Radelic including as many as 3 World Champions, while a sailor crew optimists within the team was the team champion and vice champion of the world.
Members of JK Mornar provide great technical support for the Mediterranean Games in Split, 1979th, and showed very good organization of  European Championships – European Championship Optimist 1998th, Laser 2003rd as good hosts and organizers of these occasions, a Mornar was entrusted with the organization of the European Laser Radial Championships in 2005.
In addition to sailing, Mornar for the second year, to the great satisfaction of students, teachers and principals of elementary schools, implemented by introducing students to sailing and yachting with the following objectives:
closer to children and youth sailing as part of the culture of our area from time immemorial, and they show a way of life by the sea, which requires hard work, patience and respect for nature
introduce our top athletes who achieve international results, and to hear their story
on the wind and the sea, complement the curriculum of schools and educational institutions,to offer quality content to spend their free time.
The club has over 250 national champions in all classes of boats, from the smallest Optimist through to the biggest Olympic class cruisers.