A hostile work environment
A former Carnival bar waitress said the work environment on her ship was "not healthy."
She said a former bartender she worked under "kept yelling rude things at me" in front of guests. After one incident, a guest asked why she let her boss treat her poorly.
"I didn't know how to answer," the former Carnival bar waitress said.
Carnival did not immediately respond to a request for comment.
Read more: Cruise workers say they have so much sex on ships that it's comparable to college dorms
Long hours
A former Seabourn Cruise Line production manager said the hours he worked were "grueling."
"It was like working for minimum wage some days just due to the workload," he said.
Seabourn did not immediately respond to a request for comment.
Rather than working traditional five-day weeks, cruise-ship employees often work seven days a week for the duration of their contracts, which can range from about two months to 11 months. Between four and eight months was the most common contract length cited by 31 current and former cruise-ship employees who spoke with Business Insider.
The hours can also be intense, from about eight to nearly 20 hours a day. The employees Business Insider spoke with reported an average of about 12 hours.
Visiting the same locations repeatedly
A hostess for Carnival Cruise Line said she was told she would be traveling frequently, but didn't realize her ships would be going to the same locations repeatedly.
Being treated like a number rather than a person
A Royal Caribbean Cruises employee and a contractor who has worked for Norwegian Cruise Line said they feel as if the companies have not valued them as individuals.
The Royal Caribbean employee said he is disappointed by the sense that he is "a 'number' in the corporation" rather than "a valued person."
"The industry is simply too big and growing too fast. There isn't room for the company to notice individuals for being good at their jobs," the Royal Caribbean employee said.
Royal Caribbean and Norwegian did not immediately respond to requests for comment.