Me, I would leave in safe or in a locked suitcase/bag. I always leave laptops out but an ipad is a little too tempting.
Of course, many ships have ipads already in rooms for guest use and those don't go missing.
"The test of a first rate intelligence is the ability to hold two opposed ideas in the mind at the same time and still retain the ability to function."
F Scott Fitzgerald
Seven Seas Navigator (12nts) - San Francisco - Vancouver - May13
Silversea Silver Explorer (23nts) - Kangerlussuaq, Greenland - Nome, Alaska - Aug 14