1. DP Workboats; an DP Workboats;
new era for Multicat type vessels
An new era for multicat type workboats

2. Profile
• 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
• Head Quarters in Den Helder, The Netherlands

3. Our fleet AH tugs
Our fleet
Survey Multicats Crew Tenders
Multipurpose support Shallow-draft Supply Truckable

4. Dynamic Positioning on workboats
• 2008, Acta Marine was the first operator installing DP on workboats
• Currently 4 DP vessels in operations
• All 4 vessels are ultra-shallow draft (draft < 2,0 m.)
• DP workboats are competing with standard OSV / PSV DP 2 vessels on
a competitive workboat charter rate.

5. Thruster set-up for Acta Marine workboats
For excellent position holding capabilities the DP workboats are
equiped with:
• Stern: 2 x fixed propellor & 1 x 360˚ rudderpropellor
• Bow: 1 or 2 x 360˚ horizontal propellor/jet

6. Workscope for DP workboats
Workscope 1:
Trench backfilling- Nordstream Pipeline
C.Discovery- Nordstream

7. Workscope for DP workboats
Workscope 2:
Water jetting – Maasvlakte 2

8. Workscope for DP workboats
Workscope 3:
Back-fill vessel – Maasvlakte 2

9. Workscope for DP workboats
Workscope 4: WROV Support vessel
Explosive Ordnance Disposal German Wadden Sea
OWF export cable route

10. Workscopes for DP workboats
Workscope 5:
Vibracoring/CPT survey – Murmansk
Offshore pipeline route

11. Workscopes for DP multicats
Other to be developed / tested
workscopes;
•Mass flow cable recovery
•Post lay cable jet trenching
•IRM @ offshore constructions
•Pipe lay-down monitoring
•ROV ops + Dive Support + UXO Recovery
•……………..

12. NON DP Cable & Pipeline (re)burial
Remedial lowering of cables / pipeline
● Post-lay technology
- suction dredging with jetting
- 4-point mooring
● Very effective and safe
for shore-ends, crossings
and exposed parts.
● Succesfully applied on “live”
gas pipelines and power cables.

13. Ultra Shallow Water specialisme
Wadden Sea is our backbone

14. 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