Last updated: 4 November 2026

The crossing the equator ceremony is a centuries-old sea ritual in which first-timers (“pollywogs”) are summoned before King Neptune and initiated as “shellbacks”. It is still held on navy ships, sail training vessels, cruise ships and some cargo ships. Today it is mostly good-humoured theatre with a certificate at the end.

What is the line-crossing ceremony?

“Crossing the line” means sailing across the equator. Seafarers who have done it are shellbacks, also called Trusty Shellbacks or Sons of Neptune. Those who have not are pollywogs, or “slimy wogs”. In the Royal Canadian Navy they are tadpoles; older British accounts call them griffins.

The night before the crossing, pollywogs usually receive a mock summons to appear before Neptune’s court. On the day, the court charges them with invented crimes against the sea. After their ordeals they are declared shellbacks and given a certificate. Shellback status is unofficial: the US Navy, for example, does not record it on discharge papers.

Where did the tradition come from?

Nobody knows exactly when it began. Historians link it to older rituals for passing headlands, and to tests of whether new hands could cope with a long voyage. Robert FitzRoy, captain of HMS Beagle, traced it to earlier Spanish, Portuguese and Italian customs.

Older ceremonies could be brutal, with beatings and, in some recorded cases, deaths. Ceremonies became far more common in the Second World War. From the 1980s navies began to curb hazing. Most modern navies now ban physical abuse, and the California Maritime Academy held its last ceremony in 1989 before it was banned.

Watch: an equator baptism on a merchant ship

How the ceremony works today

The format varies by ship, but the elements are familiar. Senior shellbacks play King Neptune, Amphitrite and Davy Jones, often with a “royal barber” or “doctor”. Pollywogs may wear clothes inside out, be painted, have raw eggs cracked over their heads or drink a “truth serum”. Most ceremonies end with a dunking in water or a hose-down.

On navy ships

Navies keep the tradition for morale. Royal Navy ships including HMS Queen Elizabeth and HMS Diamond held full ceremonies in 2021. Sailors were tested, painted, fed an unappealing snack and dunked. Some ships simply mark the crossing with a toast.

On cruise ships

Cruise lines stage a tamer version on deck as passenger entertainment. Crew in costume summon volunteers before Neptune. A Holland America account describes “truth serum” made of hot sauce and aftershave, raw eggs and a certificate afterwards.

On cargo ships

On freighters the ceremony depends entirely on the captain and crew. Some hold an “equator baptism” with eggs, paint and a dunking. One merchant version ends with initiates opening a can of beer on the anchor at the first attempt before receiving their certificate. On busy ships it may be a brief moment on the bridge, or nothing at all. If you want to take part, ask the captain early in the voyage.

Other line-crossing traditions

The equator is not the only line with its own title. The US Navy’s list of unofficial certificates includes several more. The rarest is the Emerald Shellback (called Royal Diamond Shellback in Commonwealth navies), for crossing the equator at the Greenwich meridian, in the Gulf of Guinea.

Watch: a cruise ship equator ceremony

Which freighter routes cross the equator?

Any voyage between the northern and southern hemispheres crosses the Line. From Europe, these are the main freighter routes where you could become a shellback.

Exact crossing points depend on the ship’s routing, weather and port rotation. A Golden Shellback (equator at the 180th meridian) is very unlikely on a commercial route.

Consigli

1. Tell the captain you are a pollywog at the start of the voyage. Crews often enjoy the excuse.
2. Pack old clothes you do not mind ruining with paint or egg.
3. Ask for a signed certificate with the ship’s name, date and position.
4. Check the GPS on the bridge (with permission) to watch the latitude tick to 0°.
5. You can always decline the messy parts – modern ceremonies are voluntary for passengers.
6. Keep the certificate: it proves your shellback status on future crossings.

Domande frequenti

Sources: Wikipedia “Line-crossing ceremony”; Naval History and Heritage Command list of unofficial US Navy certificates; Forces News (October 2021); Holland America blog; Marine Insight. Checked November 2026.