August 29th, 2022. Going out to sea is a statement relative to flight attendants. HNA is officially called a cruise attendant. The training time in the second half of the year is from August 29th to1October 22nd 10. The courses offered by seamen of seagoing ships include introduction to tourism, public relations, cruise service, front office service, catering service, specialized English for seagoing ships, professional quality education, etc.