🛢 Inspectare -- 500m Zone Asset (Installation)

Vessels planned to operate at the installation and specifically those that will enter the 500m safety zone, should be announced in advance. There should be a system in place to coordinate all vessel movements in-field. This should consider all the types of vessels attending the installation and simultaneous vessel operations. Improved planning and management of logistics can reduce the number of vessels entries and decrease the collision risk accordingly. Step Change in Safety - Marine Operations: 500m Safety Zone Sect. ''Good Practice''

All parties shall be able to communicate in English and/or another agreed common language. GS OT OPP 822 Sect. 5 The use of dialects is likely to lead to confusion and shall be avoided. Personnel operating collision monitoring equipment shall hold a proficiency certificate in the IMO standard marine communication phrases. GOMO Sect. 6

The affiliate shall issue Offshore Installation information card(s). CR OT OPP 840 Sect. 4.7 The information card contains the significant information related to the Offshore Installation and marine or subsea hazards within the zone. Data cards should include key plot plan/graphic of installation layout, geographical location, heading, water depth, specific marine hazards (e.g. risers location, no go areas, vents and overboard or underwater discharge), means of communications (routine and emergency), crane details (locations, SWL, radius and sea state restrictions), DP Positioning Reference Systems locations, the fire & emergency, abandon and toxic gas alarm visual and audible indications, bulk cargo hose connection details and cargo transfer protocols. GOMO Sect. 3 App. 3-A

Installation personnel should understand how DP reference systems operate, how they are to be maintained and what affects their performance. DP PRS shall be installed as per the installation Data Card and shall not be moved inadvertently by installation personnel. Appropriate label should advise that this is a critical piece of vessel positioning equipment which should not be moved, covered or tampered with. DP reference systems shall be installed in locations where their operation cannot be interfered with reflective clothing which could divert the point of reference. DP laser reflectors shall be manufactured (i.e. vs "homemade"), shall be kept clean and free from obstruction and preferably of reflective prism type (i.e. vs tube) for brighter signal. Step Change in Safety - Marine Operations: 500m Safety Zone Sect. 'DP Reference System Information'

VHF/UHF radio channels, telephone and e-mail contact details shall be available as reported in the installation data card and in marine operations governing standards supplied to the vessel (i.e General Marine Instructions). GOMO Sect. 6.1

The installation should have a documented adverse weather working policy that sets limits for vessel operations based on sea state and weather conditions. GOMO Sect. 8.2.5 Typical adverse weather working guidelines can be found in the GOMO UKCS Supplement. GOMO UKCS Supplement Sect. 2.1

The installation should determine trigger points for vessel operations and ensure these are monitored when the vessel is inside the 500m safety zone. Typical trigger points include: • Weather / environmental conditions (wind strength & direction, sea state, currents, visibility). • Vessel motions. • Other vessel traffic. • Loss of communications. • Lack of sufficient personnel at key control positions. • Bulk hose cargo transfer operational issues. • Overboard discharges from installation affecting vessel operations. • Equipment failure - cranes, pumps, personnel transfer basket damage, surfer platform damage. • Helicopter operations • Installation drills / general alarm. • Meal breaks and shift handover. • Change of plan in vessel or installation operations. Step Change in Safety - Marine Operations: 500m Safety Zone Sect. Para. 'Alongside / Working & Trigger Points'

The installation shall ensure that idle vessels inside the 500m safety zone are required to exit the 500m safety zone if they are not being worked or are to be left for a prolonged period (no more than 30 minutes idle time is permitted). Such vessels present an unnecessary collision risk to the installation. Vessels remaining inside the 500m safety zone to utilise the installations amenities (e.g. WiFi, mobile phone signal, etc). is strictly prohibited. GOMO Sect. 8.13

If weather side is tide dependent, the operations should be postponed until the next suitable window. The following mitigation measures shall be considered: • Reduced use of engines power (e.g. <40%) • Minimum level of Bridge Team experience (e.g. track record, knowledge of the installation metocean environment) • Reduced duration alongside considering increased collision exposure and concentration required from the Bridge Team (e.g. stand-by prohibited, no bulk transfer) • Prohibited SIMOPS (e.g. seismic, construction, drilling) as it will compromise escape route • Reduced waves criteria considering impact on station keeping, motions and waves breaking over the deck Working on the weather side of the installation shall be prohibited if the drift or the close proximity of the vessel put unprotected risers at collision risk. TEPA Life Saving Checks

Working at a distance below 10 meters from the installation shall only be considered during slack waters. The mitigation measures shall include the mitigation measures for weather side working. In addition, the vessel shall only be handled in manual as DP footprint might result in excessive excursion incompatible with the close proximity. Working at less than 10 meters from the installation shall be prohibited if the drift or the close proximity of the vessel put unprotected risers at collision risk. TEPA Life Saving Checks

TEPA Life Saving Checks

Sunken hoses can entangle in vessel's thrusters and become a fatal hazard as they swipe around. Floatation can be achieved either by floatation collars or self-floating hoses. Hoses shall be of a sufficient length to give the vessel heading flexibility and safe distance from the installation. TEPA Life Saving Checks

No vessel shall enter the safety zone without the permission of the RSES or his/her appointed deputy. CR OT OPP 840 Sect. 4.8 Responsibilities include: • Control of all vessel movements in the 500m zone to ensure operations are carried out efficiently and to minimise time alongside the installation. • Co-ordination of multiple marine-associated communications within the installation and between the installation and the vessel (e.g. control room operator, crane operator, deck foreman). • Ensuring communications between vessel and installation are established prior to entry to the 500m zone and that they are maintained throughout the operation and on departure. Authorization for entry will be based on the completion of a pre-entry checklist completed jointly by the visiting vessel and the offshore installation. Step Change in Safety - Marine Operations: 500m Safety Zone Sect. 'Legislation & Responsibilities', Para. 'Marine Responsible Person'

Reference is made to the Life Saving Checks for the entry of a vessel within the 500m of an offshore installation. Installation personnel shall ensure that all parts of the checklist are completed and that deviations are discussed and agreed with the relevant marine technical authorities contacted for advice, prior to the vessel entering the 500m safety zone. TEPA Life Saving Checks

Drift Off: Circumstances whereby, in the event of loss of power, environmental forces would result in a vessel moving away from an offshore facility or other navigational hazard. Drift On: Circumstances whereby, in the event of loss of power, environmental forces would result in a vessel moving towards an offshore facility or other navigational hazard. GOMO Sect. 2.2

Installations and vessels shall conduct pre-entry checks and be facilitated by a specific radio toolbox talk. Installation personnel must be aware of the implications of not properly completing checklists and the hazards that this may present to the installation. GOMO App. 8

Failure to utilise relative position referencing on the vessel can result in a vessel-installation collision, as the vessel's DP system is not able to follow the swing/rotation or excursion of the installation. DP vessels relying on a combination of absolute position referencing and observation to avoid collision is not effective in preventing collisions with free weathervaning / non-heading controlled floating installations or DP installations (e.g. DP accommodations barges, drilling rigs). IMCA M252 Section 6 MTS Operations Guidance Pt. 1 Sect. 4.6

On DP mobile installation, this might be done by the second DPO on watch. On non-DP mobile installation, this might be done by the deck foreman. Step Change in Safety - Marine Operations: 500m Safety Zone Sect. 'Legislation & Responsibilities', Para. 'Marine Responsible Person'

The escape route(s) should be identified. The escape route should provide a clear path for the vessel to follow, when making a routine, or emergency, departure from the installation. Other vessels should stay clear of the escape route. Other considerations may include the environmental conditions/aspect and the resultant power management requirements when escaping against the weather. IMCA M182 Sect. 4.6