DP Workboats; An new era for multicat type workboats

DP Workboats; a new era for Multicat type vessels

• Owner and operator of 40 workboats for coastal waters

• 40 years experience

• Independent company with a global presence

• Standard & custom built vessels

- Ultra shallow water

- Cable & pipeline (re)burial

• Headquarters in Den Helder, The Netherlands

Profile

Truckable

Survey Multicats Crew Tenders

Shallow-draft Supply Multipurpose support

Our fleet Our fleet AH tugs

Dynamic Positioning on workboats

• 2007, Acta Marine was the first operator installing DP on

workboats

• Currently 4 DP vessels in operation

• All vessels are ultra-shallow draft (draft < 2,0 m.)

• DP workboats are competing with standard OSV / PSV DP 2

vessels at a competitive workboat charter rate.

Thruster set-up for Acta Marine workboats

For excellent position holding capabilities the DP workboats are

equipped with:

• Stern: 2 x fixed propellor & 1 x 360˚ rudder propellor

• Bow: 1 or 2 x 360˚ horizontal propellor/jet

Workscope for DP workboats

C.Discovery- Nordstream

Backfil of trench; • Nordstream Pipeline, soil layers of 25 cm where backfilled in the trench • Maasvlakte 2, shallow area spray pontoon

Workscope for DP workboats

Water jetting; Maasvlakte 2, cleaning breakwater for the installation of an additional concrete blocks layer

Workscope for DP workboats

Offshore Oil & Gas maintenance; • Change out Offshore oil bunker hose GDF SUEZ EP • Removal and installation of splash zone constructions

Workscope for DP workboats

WID / Mass flow trenching; Removed 30.000m3 sand per day in the port of Sidi Ifni Morocco

Workscope for DP workboats

WROV Support platform; Explosive Ordnance Disposal German Wadden Sea OWF export cable route

Workscopes for DP workboats

Vibrocoring/CPT survey; Murmansk Offshore pipeline route Sthokman field

Additional workscopes for DP multicats

• Trenching with mobile trencher unit

• ROV support platform • Accommodation (12 additional to vessel crew) • Diving from 4p c/t anchor spread • Offshore access to constructions • (Heave comp) Crane works • Cable laying • Cable burial • Cable survey • Cable recovery and jointing • Cable protection deployment (Mattresses etc) • TP cable protection installation (Messenger wire technique)

NON DP Cable & Pipeline (re)burial

● Post-lay technology - suction dredging with jetting - 4-point mooring - Life tracking of burial process

● Very effective and safe for shore-ends, crossings and exposed parts.

● Succesfully applied on “live” gas pipelines and power cables.

Remedial lowering of cables / pipeline

Ultra shallow water specialism

Wadden Sea is our backyard

Thank you for your attention Acta Marine B.V. Het Nieuwe Diep 39d 1781 AE, DEN HELDER The Netherlands T +31 (0)223 615666 www.actamarine.com