A cruise has been on my wishlist of things to do for years, but my dreams were modest. A river cruise down the Godavari at the most, or the backwaters of Kerala. What came my way, however, quite dwarfed that little plan it was a chance to go aboard the Mariner of the Seas, a rather magnificent vessel from the cruise line Royal Caribbean International for a three-night sailing ex-Singapore. My visions had included a gentle pace, a fort or two coming into view, reeds along the banks, quietude, otters and other creatures going plop in the water. In contrast, this was going to be a fuel-guzzling, industrial-age exercise. On the principle that one must not turn away from the life offered in favour of the life imagined, the day saw me standing at Singapore&rsquos Marina Bay Centre looking up at this cruise liner, ready to sail.