Marine order 27 sets out the requirements for:

• safe navigation
• radio equipment and communications
• danger, urgency and distress signals and messages.

Related content 

• Global Maritime Distress and Safety System (GMDSS) radio logbook
• Navigation through the Great Barrier Reef and Torres Strait 
• Under Keel Clearance Management

List of material referenced in this marine order:

• GMDSS radio log book
• General requirements for shipborne radio equipment forming part of the Global maritime distress and safety systems and for electronic navigational aids, IMO resolution A.694(17)
• Guidelines for voyage planning, IMO resolution A.893(21)
• Guidelines for recording of events related to navigation, IMO resolution A.916(22)
• Guidelines on voyage planning for passenger ships operating in remote areas, IMO resolution A.999(25)
• Guidelines for ships operating in polar waters, IMO resolution A.1024(26)
• International Convention for the Safety of Life at Sea (SOLAS) - Chapter IV and V (search, register or borrow)
• International Convention on Standards of Training, Certification and Watchkeeping for Seafarers 1978 (STCW Convention) (access)
• International Aeronautical and Maritime Search and Rescue Manual (IAMSAR Manual) published jointly by ICAO and the IMO (access or purchase)
• International Code of Signals, IMO (access or purchase)
• List of ship stations, International Telecommunications Union (access or borrow)
• List of call signs and numerical identities of stations used by the Maritime Mobile Satellite Services, International Telecommunication Union (access or borrow)
• Magnetic compasses carriage and performance standards, IMO resolution A.382(X)
• Manual for use by the Maritime Mobile and Maritime Mobile Satellite Services, International Telecommunications Union (access or borrow)
• Performance standards for echo sounding equipment, IMO resolution A.224(VII) amended by MSC.74(69) Annex 4
• Recommendation on methods of measuring noise levels at listening posts, IMO resolution A.343(IX)
• Performance standards for gyro-compasses, IMO resolution A.424(XI) 
• Performance standards for rate-of-turn indicators, IMO resolution A.526(13)
• Performance standards for INMARSAT-C ship earth stations capable of transmitting and receiving direct-printing communications, IMO resolution A.807(19) amended by MSC.68(68)
• Performance standards for ship earth stations capable of two-way communication, IMO resolution A.808(19)
• Performance standards for shipborne Decca navigator receivers, IMO resolution A.816(19)
• Performance standards for electronic chart display and information systems, IMO resolution A.817(19) amended by MSC.64(67) Annex 5 and MSC.86(70) Annex 4
• Performance standards for shipborne GLONASS receiver equipment, IMO resolution MSC.53(66) and revised by MSC.113(73)
• Performance standards for shipborne Loran-C and Chayka receivers, IMO resolution A.818(19) amended by MSC.112(73)
• Performance standards for shipborne Global Positioning System (GPS) receiver equipment, IMO resolution A.819(19)
• Performance standards for devices to indicate speed and distance, IMO resolution A.824(19)amended by MSC.96(72) and MSC.334(90)
• Performance standards for shipborne voyage data recorders, IMO resolution A.861(20) as amended by MSC.214(81) and revised by MSC.333(90)
• Recommendation on performance standards for integrated bridge systems, IMO resolution MSC.64(67) Annex I
• Recommendation on performance standards for shipborne DGPS and DGLONASS maritime radio beacon receiver equipment, IMO resolution MSC.64(67) Annex 2 and revised by MSC.114(73)  
• Recommendation on performance standards for heading control systems, IMO resolution MSC.64(67) Annex 3
• Recommendation on performance standards for radar equipment, IMO resolution MSC.64(67) Annex 4
• Recommendation on performance standards for shipborne combined GPS/GLONASS receiver equipment, IMO resolution MSC.74(69), Annex I
• Recommendation on performance standards for automatic radar plotting aids, IMO resolution A.823(19)
• Recommendation on performance standards for track control systems, IMO resolution MSC.74(69), Annex 2
• Recommendation on performance standards for an universal shipborne automatic identification system, IMO resolution MSC.74(69) Annex 3
• Revised guidelines for the onboard operational use of shipborne automatic identification systems, IMO resolution A.956(23)
• Table of deviations of the standard/steering compass (AMSA 408)
• The Radio Regulations Edition of 2012, International Telecommunications Union (access or borrow)
• Unification of performance standards for navigational equipment, IMO resolution A.575(14)

Standards