Disney Cruise Line (DCL) has four ships that run throughout the year.DCL had to get special permission from the US Coast Guard to be able to use yellow lifeboats instead of standard orange ones on its ships.You can complete a 5K race on the cruise ship, or at Disney's private island in the Bahamas.Disney movies debut at sea the same day they premiere in theaters on land.Visit Insider's homepage for more stories.You may have heard of Disney Cruise Line, or DCL, but you might not know much about the magical trips.DCL has four shipsthe Disney Magic, the Disney Wonder, the Disney Fantasy, and the Disney Dreamand each offers a different experience, though many have some of the same special details and designs.Here are some interesting things you may not know about Disney cruises.DCL had to get special permission to use yellow lifeboats on its ships.DCL was the first cruise line to have lifeboats that are yellow and not the regulated orange colorand it had to get special permission from the US Coast Guard to do so.The yellow boats are meant to be the same shade as Mickey Mouse's shoes, which keeps the ship's Mickey color schemethe hull of the ship is black, the superstructure is white, the funnels are red, and the trim is yellow.You can easily navigate the ship by looking down at your feet.The hallways on a DCL ship might seem confusing, but no matter where you're going you can direct yourself by looking down at the carpet, since the stars on it always point toward the front of the ship.On the Disney Dream and Disney Fantasy, you can also remember what side of the deck your room is on by looking at the clips on the side of your door.The starboard (right) side rooms have starfish clips and the port (left) side rooms have fish clips.Minnie Mouse was promoted to Captain Minnie in 2019 as part of a STEM initiative.Captain Minnie was introduced to DCL in April 2019 because Disney wanted to help inspire the next generation of female leaders in the maritime industry.The initiative also included the debut of a new youth program where Captain Minnie Mouse helps train young passengers in STEM (science, technology, engineering, and math) skills that are needed for success on an ocean-liner.Disney has a private island that many of its cruises visit.Located in the Bahamas, Disney's private island Castaway Cay is on the itinerary for a number of DCL trips.The island has a beach for families, and it also has an adults-only beach called Serenity Bay, which is tucked away off an old airstrip. This beach has a dedicated lunch spot and bar, too.While on a Disney cruise, you can run a 5K race.The race takes place on Castaway Cay, but if a ship doesn't dock there due to weather conditions, the Castaway 5K will typically happen on the ship.DCL ships have unlimited, free soft-serve ice cream.Throughout the ship, guests can have unlimited, free ice cream from designated machines.For those who are willing to spend a few bucks, some of the DCL ships also have specialty gelato shops where you can get themed sundaes.Cruisegoers can get unlimited Mickey-shaped ice-cream bars delivered to their room for free.The same Mickey-shaped ice-cream bars that you can get at Disney parks are available on the ships for free, and those onboard a Disney cruise can use the 24-hour room service to order them whenever they like.Some of the DCL ships play famous Disney songs with their horns.On both the Disney Fantasy and the Disney Dream, you'll hear quite a few familiar Disney songs when the ship blows its horn.Song selection is up to the captain and the crew, but some of the songs they can choose from are "When You Wish Upon a Star," "Yo Ho (A Pirate's Life for Me)," "It's a Small World," "Be Our Guest," and "Do You Want to Build a Snowman."The cruises use fireworks that are made of "fish food."DCL claims to be the first cruise line to have fireworks at sea, and its fireworks' shells are actually made of special biodegradable materials, which Disney calls "fish food."All Disney movies premiere on the ship when they debut in movie theaters on land.On Disney cruises, new movies typically get a midnight premiere and then have multiple showings in the weeks and months that follow the initial release.On the ships, iconic Disney characters can be found wearing special outfits each night.DCL packs a whole new wardrobe for its beloved characters, like Mickey, Donald Duck, and MinnieDuring each night of the cruise, Mickey and the gang are dressed in something different, like formal attire, pirate-themed garb, or even the traditional outfits of the place the ship visited that day.Read more:Disney Cruises celebrate Halloween with both kid-friendly and adult-only events. Here's what it's really like.I went to Disney's private island, Castaway Cay, and now I understand why it's such a hugely popular destination22 secrets about Disneyland's most famous attractionsYou can now book a European cruise that's entirely dedicated to chocolate Click here to read full news..