The cruise lines need to all work from the same hymn sheet...
Charge the same per day, call it what it really is : a service charge, make it mandatory and add it into the final invoice regardless as to where you hail from in the world.
Simple as that...no messing about, no confusion, no aggro at the reception desk and no heart attack at the end of the cruise when you find the bill is higher than budgeted for cos "the agent never told me about the tips thing"...
Costa Pacifica - Dec 2012
Costa Favolosa - June 2013
Costa Deliziosa - Dec 2013
1965 - Cunard Queen Mary, 1967 - Cunard Queen Elizabeth, 1970 - Cunard Queen Elizabeth 2, 1971 - P&O Oriana, 1972 - SS France, 1975 - SS Leopard, 1977 - P&O Canberra, 2005 - NCL Jewel, 2005/6 - NCL Crown, 2006 - FOCL Braemar, 2007 - FOCL Braemar, 2007 - FOCL Braemar, 2007 - NCL Gem, 2008 - Costa Allegra, 2010 - Costa Allegra 34 Day B2B, 2011 - Costa Victoria, 2012 - Costa Classica