How far does category B let you sail?

What "navigation area III" actually means

Croatian law sorts coastal waters into numbered navigation areas, defined by how far they sit from the nearest coast. The areas, and the vessel rules that go with them, are set out in the Pravilnik o brodicama, čamcima i jahtama (NN 13/2020). Category B is tied to area III, which the regulation describes as navigation with a limit of 12 nautical miles from the nearest coast — and it includes the gentler waters nested inside it (areas IIIa at 6 NM, IIIb at 3 NM, IIIc at 1 NM) plus area IV, which is ports, bays and river mouths navigable from the sea.

The phrase that matters is from the nearest coast — mainland or island. The 12 miles are not measured from your marina; they are measured from whatever land is closest at any given moment. Because the Adriatic is densely scattered with islands, you can cruise a long way down the coast and almost never be 12 miles from something. The limit only bites when you cross an open stretch of sea with no land within range.

Two limits, not one: skipper and vessel

Your licence is only half of the equation. Every boat also has a certified navigation area of its own — the waters its build and equipment are approved for. You are bound by whichever of the two is stricter.

In practice that means a category B skipper on a boat certified only for, say, area IIIb is held to that 3-mile inshore limit, licence notwithstanding. It rarely catches people out on a normal charter yacht, which is typically certified for the same coastal waters the licence allows — but it is worth a glance at the boat's papers before you plan anything ambitious.

• Your certificate sets one ceiling. Category B gives you area III — roughly 12 NM from the nearest coast.
• The boat's certificate sets another. Its approved navigation area may be narrower, especially on small craft.
• The stricter one wins. You may go only as far as both documents independently allow.

What 12 miles covers in real Adriatic cruising

For the routes holidaymakers gravitate to, area III is roomy. The classic Dalmatian and Kvarner island chains — Brač, Hvar, Korčula, the Pakleni islands, the Kornati, the islands off Zadar and Šibenik, the Rijeka archipelago — sit close enough together that you are almost always within 12 miles of a coast. Comfortable island-hopping, the popular charter circuits, hopping between bays for lunch and a new anchorage each night: all of that lives well inside the limit.

Even the offshore-feeling destinations are mostly fine, because the rule keys off the nearest land, not your starting harbour:

• Reaching Vis — it lies a bit over 15 miles off the mainland, but you cross via Hvar and Šolta, so you stay within range of a coast the whole way.
• Biševo and its Blue Cave — only about 5 miles off Vis, comfortably inside the limit.
• The long run down through the islands toward Lastovo and Korčula — island cover most of the way.

Where it genuinely runs out is the deep open-sea crossing. Palagruža, far out in the mid-Adriatic, is the clearest example: the nearest Croatian island (Sušac) is over 20 nautical miles away, and it is roughly 40 miles from Komiža. A crossing like that puts you well beyond 12 miles from any coast for hours — outside what area III lawfully covers, quite apart from being a serious passage in its own right. Treat the outermost islands as off the menu for category B, not a stretch goal.

How category B compares — and what reaches further

Category B is the middle of the recreational range. Category A sits below it: a more limited inshore certificate for small, low-powered craft kept closer to shore — fine for a dinghy or a small day boat near the coast, but not for the open coastal cruising area III allows. Above category B, higher qualifications and wider navigation areas exist for those going further out or commanding larger or commercial vessels — area II reaches to 20 NM, and the unrestricted areas beyond that are the realm of professional certificates, not a holiday licence.

For the great majority of charter holidays, category B is the right and sufficient level. If your plans genuinely involve crossing open sea to the outermost islands, that is a conversation to have with a charter base and the harbour master before you book — not something to assume the licence stretches to cover.

What the 18-metre figure actually covers

You will see "18 metres" quoted for category B — and the figure is real. Two lines matter: a brodica (boat) is by definition a hull up to 15 metres, and on top of that category B lets you command a jahta (yacht) up to 18 metres for personal use or bareboat charter. Since 2020 the rule (NN 13/2020) draws this line by length — it replaced the old 30 GT tonnage cap. Above 18 m, a yacht-master qualification is required.

The practical limits worth holding onto are the real ones: the navigation area (about 12 NM from the nearest coast), the boat's own certified area, and — for under-18 holders — an engine cap of 15 kW. And if a yacht is over 18 m, it is no longer a category B boat at all.

Common questions