The popular cruise line operator gears up for a financial update it can't afford to sink.It's time for the world's most valuable cruise line operator -- by market cap and enterprise value -- to offer up fresh financials. Royal Caribbean Cruises (RCL -1.05%) will step up with its third-quarter report on Tuesday morning.Expectations are high for the company with a fleet of 68 ships across five different brands. The shares hit an all-time high this month, more than quadrupling since the start of last year. Thi ...