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3


Application


This Code applies to all Maritime Autonomous Surface Ships of less than 24 metres in length and provides guidance for larger ships while operated on the sea or navigable waters, for reward, for pleasure andrecreation, or for other purposes, while on domestic voyages from the United Kingdom.


3.1 Classes of Maritime Autonomous Surface Ship (MASS)


3.1.1 The Code identifies several classes of MASS based on the intended use, size, speed and potential hazard to other shipping. The intention of these classes is to discriminate those MASS that are inherently unlikely to cause a hazard to most other marine users, by virtue of their size and speed, from those classes of MASS that by nature of their size and speed, are likely to pose an equivalent hazard to that posed by manned vessels to other marine users. These classes are primarily derived from the existing categories that are contained within either the COLREGS or the Load Line convention and are purposely selected to maintain commonality of requirement with those instruments wherever possible.


3.1.2 The classes also reflect the feasible level of situational awareness that can be provided, given size and payload constraints.


3.1.3 Classes of MASS are shown below at Table 3.1. It should be noted that this Code will primarily apply to Ultra-Light, Light, Small classes and some High-Speed vessels. It should also be noted that where two criteria are specified (e.g. length and speed) both must be satisfied or the class assignment defaults to the class above. Exemptions may be specially considered on a case-by-case basis.


Table 3.1: Classes of MASS Class of MASS Characteristic


Ultra-light Light Small Large High-Speed* Length overall <7m and maximum speed <4kts Length overall ≥ 7m to <12m and maximum speed <7kts Length overall ≥ 12m to <24m Length ≥24m (and 100 GT) Operating speed V is not less than V = 7.19 ∇1/6 knots


Notes *Derived from MCA High-Speed Craft Code (https://www.gov.uk/govern-


ment/uploads/system/uploads/at tachment_data/file/292155/hsc_ 2000_rev06-09_full-comp- all.pdf)


where ∇ = moulded displacement, in m3,


of the craft corresponding to the design waterline.


3.1.4 For the purposes of this Code, these classes will apply to MASS constructed on or after 1 January 2019. Derogations from these classes may be appropriate in certain circumstances where risk to other marine traffic can be proven to be reduced and may be considered by the relevant authority. However, this will normally be the exception to the rule.


Maritime Autonomous Surface Ships up to and including 24 metres in length 17


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