ms Seven Seas Mariner is a passenger cruise ship with identification IMO number 9210139, MMSI number 311622000 and call-sign number C6VV8, registered in the Bahamas. The cruise ship is owned by NCL Norwegian (since 2014) and operated by Regent Seven Seas Cruises. The vessel debuted in 2001.
IRC 2003 Handrail height, measured vertically from the sloped plane adjoining the tread nosing, or finish surface of ramp slope, shall be not less than 34 inches (864mm) and not more than 38 inches (965 mm).
Handrails shall not project more than 4.5 inches (114 mm) on either side of the. stairway and the minimum clear width of the stairway at and below the handrail height, including treads and landings, shall not be less than 31.5 inches (787 mm) where a handrail is installed on one side and 27 (698 mm) where handrails are.