You shouldn’t need to learn a whole new language to take a vacation. Still, your cruise booking, itinerary, ship map, and onboard announcements can sound as if everybody else already knows the vocabulary.

Here are 15 common cruise terms explained in plain English, along with the practical details that matter when you’re planning your trip.

Getting On, Getting Off, and the Days Between

Embarkation

Embarkation means boarding the ship at the beginning of your cruise. Embarkation day is also when you check in, go through the cruise terminal, board the ship, and officially begin your vacation.

Follow the arrival and check-in instructions provided for your specific sailing. Your assigned arrival time and terminal details can vary.

Debarkation

Debarkation means leaving the ship at the end of your cruise. You may also see the word “disembarkation.” Both terms refer to getting off the ship.

Unfortunately, this is the part of the trip when the crew expects you to take your luggage home instead of hiding somewhere and staying for another week.

Sea Day

A sea day is a day without a scheduled port stop. The ship becomes your destination for the day, so check the onboard schedule for activities, entertainment, restaurant hours, and other events.

Port Day

A port day is a day when the ship calls at a destination. This is when passengers can usually leave the ship to explore independently or take a shore excursion.

Pay close attention to the ship’s departure time and the posted all-aboard time. The all-aboard time is the deadline passengers need to follow when returning to the ship.

Tender Port

At some destinations, the cruise ship cannot dock directly at a pier. Instead, a smaller boat transports passengers between the ship and shore. This is known as tendering, and the destination is commonly called a tender port.

Tendering can add time to the process of getting ashore. Your cruise line may use tickets, assigned groups, priority access, or another boarding procedure. Follow the instructions provided for your sailing rather than assuming you can simply walk off the ship.

Finding Your Way Around the Ship

For the following directions, imagine that you are standing on the ship and facing the front. Port and starboard refer to fixed sides of the vessel, so they do not change when you turn around.

Port Side

Port is the left side of the ship when you are facing forward.

Starboard

Starboard is the right side of the ship when you are facing forward.

According to the National Oceanic and Atmospheric Administration, ships use port and starboard because these terms identify fixed locations and avoid the confusion that ordinary left and right directions could cause. You can read NOAA’s explanation of port and starboard for more detail.

Forward

Forward means toward the front of the ship. The front end of the ship is also called the bow.

Aft

Aft means toward the back of the ship. The back end is also called the stern.

Midship

Midship refers to the middle section of the ship.

These terms are especially helpful when reading a deck plan or locating your cabin. If your stateroom is described as “aft starboard,” for example, it is toward the back on the ship’s right side when facing forward.

Terms on Your Booking and Daily Schedule

Stateroom

A stateroom is simply the cruise line’s name for your room or cabin. The terms may be used interchangeably.

Guaranteed Cabin

A guaranteed cabin, sometimes shown as a guarantee or GTY booking, generally means you choose a cabin category while the cruise line chooses your specific room.

Do not assume that “guaranteed” means you get to select the deck, exact location, or view. Your room may be assigned later, and the available category can include locations or views you would not have selected yourself.

For example, Royal Caribbean explains that its guarantee stateroom assignments can be made at the cruise line’s discretion and may include an obstructed view. Other cruise lines have their own rules, so read the conditions attached to your exact fare.

A guaranteed cabin can be a reasonable choice when price matters more than location. It may be a poor choice if you need connecting rooms, want to avoid noisy areas, or care about being near a particular elevator, venue, or section of the ship.

Specialty Dining

Specialty dining usually refers to restaurants outside the ship’s standard included dining options. Depending on the restaurant and cruise line, you may pay a cover charge, order from an à la carte menu, use a dining package, or receive access through a promotion.

Check what is included on your particular sailing before making a reservation. “Specialty” usually means there is an additional cost, but the exact price and terms can vary.

Muster Drill

The muster drill is the required safety briefing that explains where to go and what to do in an emergency. Your cruise line will provide instructions explaining how and when to complete it.

The process is not identical on every ship. Some steps may be completed through an app or stateroom television, while other steps may require visiting an assigned muster station. Follow the instructions for your sailing and complete every required step.

Onboard Credit

Onboard credit is a credit applied to your cruise account for eligible purchases. Think of it as spending credit connected to your sailing rather than cash automatically placed in your pocket.

The purchases it can cover, whether it can be used before boarding, and what happens to any unused balance depend on the cruise line and the type of credit. Check the offer’s terms before planning how you will spend it.

The Three Terms to Check Before You Spend Money

If you remember only three things from this guide, make them these:

• A tender port may change how long it takes to get ashore and return to the ship.
• A guaranteed cabin gives the cruise line control over your specific room assignment.
• Onboard credit comes with conditions that can affect when and where it may be used.

The basic cruise terms are easy once someone explains them. The details attached to your own booking still deserve a careful look.

Frequently Asked Questions About Cruise Terms

Is port the same thing as a port day?

No. Port side means the ship’s left side when you are facing forward. A port day is a day when the ship stops at a destination.

Does a guaranteed balcony mean I will receive an ocean-facing balcony?

Do not assume that it does. The available category and assignment rules vary by cruise line. Some ships have different balcony locations, neighborhood-facing balconies, or cabins with obstructed views. Read the exact fare description before booking.

Can I spend onboard credit on anything?

No single rule covers every type of onboard credit. Check whether your credit can be used before the cruise, which purchases qualify, and whether an unused amount expires at the end of the sailing.

Is a tender boat the same as a lifeboat?

Not always. Cruise lines may use a ship’s own boats or local vessels to transport passengers between the ship and shore. Follow the crew’s directions for the tender operation at your destination.

Ready to Plan Your Cruise?

If you still have questions about cabins, itineraries, or what all those cruise terms mean for your trip, visit Holletts At Sea. Your vacation should start with a cocktail, not confusion.

Sources

• National Oceanic and Atmospheric Administration: Why ships use port and starboard
• Royal Caribbean: What is a guarantee stateroom and how does it work?

Definitions and source pages reviewed September 2026. Booking terms and onboard procedures can differ by cruise line, ship, fare, and sailing.