Unfortunately, discovering that the ship I'll be on has a rather checkered history doesn't sooth the nerves too much. Here's what Wikipedia had on this ship's past "incidents":
Grounding off St. Maarten
After evacuating a sick passenger at Philipsburg, St. Maarten, the Netherlands Antilles on 15 December 1998, Monarch of the Seas grazed a reef while departing opening a 40 by 2 metres (130 by 6.6 ft) gash along the starboard hull. The ship started taking water and began to sink by the head. Three of its watertight compartments were completely flooded and several others partially flooded.
It was intentionally grounded on a sandbar to prevent further sinking. All passengers were evacuated by crew members and local tender operators. No lives were lost. The grounding breached two of the ships diesel fuel tanks and an overflow tank causing a small fuel spill of approximately 100 US gallons (380 l; 83 imp gal). There was also severe damage to the ship.[8][9] A joint investigation by the Norwegian Maritime Investigator and the United States Coast Guard found that the accident was due to “…a myriad of human performance deficiencies.” Reports also indicate that navigation out of the port was done visually rather than using of electronic navigation and that the relocation of a vital buoy was not reflected on charts.
The ship was drydocked for repairs for three months at Atlantic Marine’s Mobile, Alabama facilities. One-hundred and fourteen of the ship’s compartments had to be cleaned. The work also included the replacement of machinery, 460 tons of shell plating, and 18 miles (29 km) of electrical wiring.
Gas leak
While docked at the port of Los Angeles in August 2005, maintenance on a sewage pipe caused a small amount of raw sewage and an unknown amount of hydrogen sulfide gas to escape. Three crew members, Boris Dimitrov of Bulgaria; Willie Tirol of The Philippines and Radomilja Frane of Croatia, were killed and 19 others were injured. Reports said that the deaths were almost instantaneous as the crew members were not wearing breathing apparatus at the time.
Captain's death
38 year old Captain Joern Rene Klausen was found dead in his stateroom aboard the Monarch of the Seas early the morning of January 30, 2006. The ship was returning to Los Angeles from a three-night cruise to Ensenada, Mexico.[14] According to reports, the death appeared to be of "natural causes".
2010 New Year suicide
A 23-year old woman passenger jumped off the 11th deck of the ship around 4am on Thursday, December 31, 2009. The woman was reported missing by her husband, a Royal Caribbean employee.
2012 January suicide
A crew member jumped off the 7th deck of the ship early in the morning on Wednesday, January 11 2012 while en route to Nassau, Bahamas. The crew member was witnessed throwing himself over the safety rail into the water below. A search was conducted shortly afterwards with help from other cruise ships from Norwegian Cruise Line, Carnival Cruise Line, and Disney Cruise Line. The Monarch of the Seas was eventually released by the Bahamian Coast Guard, who continued the search. A life jacket was found later in the day, but the crew member remained missing.
I'll let you know if I experience any ghost encounters.