The Jewish community is one of the largest in the world, and also one of those who like to travel the most, however there are some Gastronomic peculiarities that must be taken into account when cruising, I am talking in particular about Kosher food.
As defined by wikipedia, Kosher is the part of the precepts of the Jewish religion that deals with what practitioners can and cannot ingest, based on the biblical precepts of one of the biblical books of the Old Testament and the Tanach.
While is true that most companies, especially large multinationals and luxury ships, do know these foods individuals from the Jewish community, For others, however, all this goes unnoticed.
Among the different pages that I have navigated, I can tell you that the Royal Caribean, for example says that requests for food during Passover have to be received 90 days in advance, or the order is not guaranteed. This request can be made directly through an email that the company offers or from the travel agent in observations. The same goes for Pullmantur which extends the order to 6 weeks.
Aboard the ships MSC Preziosa, MSC Divina, MSC Splendida, MSC Fantasia, MSC Magnifica, MSC Poesia, MSC Orchestra and MSC Musica Kosher ready meals are offered that must also be requested when making the reservation.
Oceania Cruises serves special menus if requested 90 days prior to ship departure. They have 70 food options, prepared with the best glatt Kosher meats. Food is frozen and double wrapped to allow reheating of foods in non-kosher ovens, but is served on kosher dinnerware with appropriate cutlery. This type of food is served in the Grand Dining Room restaurant, you have to say it once you are on board, to coordinate the reservation.
Disney Cruises seem to take the least time to order Kosher food, which is available on all ships and itineraries., and that it has to be reserved at least 7 days in advance.