Fewer lost days waiting on weather.
Norwegian Dynamics builds heave compensators and crane shock absorbers, designed to DNV-ST-0378. We model your whole lift in CONSTELLATION — our in-house time-domain simulator — to size them to your operating window, across subsea, oil & gas and offshore wind.
See your weather window before you sail
Every ND compensator is screened in CONSTELLATION across the full sea-state range, gate by gate. Below: a representative deck-to-seabed install of a ~190 t subsea structure on the ANTARES 250 t adaptive compensator, head sea, representative winter climatology.
The workable region reaches Hs 2.5 m at the design period (Tp 8 s). The marked design cell is the modelled sea state (Hs 2.0 m).
Modelled prediction screened to DNV-RP-N103 and ND-DS-10 on a representative metocean basis — an engineering estimate, not a certified analysis. The operating window is confirmed against project metocean and the contracted vessel for each lift.
From the splash zone to the seabed — and back up.
Whatever phase of the lift the dynamic loads bite, there is a compensator and an operations playbook for it.
Splash-zone crossing
Keep the slam and snap off the crane and rigging through the wave zone.
Subsea lift & landing
Control dynamic loads from surface to seabed and land safely first time.
Subsea retrieval
Break out and recover through the water column with the snap held in check.
Resonance avoidance
Keep the suspended load detuned from the wave period.
Transfer lift
A clean load transfer between two independently moving vessels.
Quick lift off a barge
Snatch the payload off a heaving barge before the next wave returns.
Pile-run protection
Cap the shock when a driven pile breaks free and runs.
All applications
Browse every operation we support — including resonance, tensioning and weather-window studies.
Product family
Heave compensators and crane shock absorbers — a complete toolkit.
Six product solutions cover passive, adaptive and active heave compensation, crane shock absorption and tensioning. Start with SWL, stroke, installation type and operation sequence; the simplest suitable product is usually the right starting point.
The product family at a glance
Engineering review depends on sea state, wave period, payload, water depth and operation sequence.
| Compare |  |  |  |  |  |  |
|---|---|---|---|---|---|---|
| Type | Adaptive PHC | Basic PHC | Passive Heave Compensator | Active HC | Shock absorber | Riser tensioner |
| Best fit | Complicated, multi-step subsea lifts | Simple splash-zone crossings and compact PHC | Heavy subsea lifts above the RIGEL range | Topside or subsea active motion compensation | Crane shock absorption and overload protection | Backup riser tensioning |
| SWL | 30–4,000 t | 55–1,000 t | 12.5–10,000 t | 75–2,500 t | 75–4,000 t | 350 / 500 t |
| Stroke | 2.5–8.0 m | 1.0–6.0 m | 1.0–6.0 m | 2.5–6.0 m | 1.0–8.0 m | 3.0–12.0 m |
| Control | Automatic damping, self-centering spring, quick lift | Manual damping and stiffness | Manual damping, self-centering spring | Automatic damping, active cylinder control, self-centering spring | Manual damping | Manual damping |
| Form factor | Subsea | Subsea | Subsea | Topside / subsea | Topside | Topside |
- Type
- Adaptive PHC
- Best fit
- Complicated, multi-step subsea lifts
- SWL
- 30–4,000 t
- Stroke
- 2.5–8.0 m
- Form factor
- Subsea
- Type
- Basic PHC
- Best fit
- Simple splash-zone crossings and compact PHC
- SWL
- 55–1,000 t
- Stroke
- 1.0–6.0 m
- Form factor
- Subsea
- Type
- Passive Heave Compensator
- Best fit
- Heavy subsea lifts above the RIGEL range
- SWL
- 12.5–10,000 t
- Stroke
- 1.0–6.0 m
- Form factor
- Subsea
- Type
- Active HC
- Best fit
- Topside or subsea active motion compensation
- SWL
- 75–2,500 t
- Stroke
- 2.5–6.0 m
- Form factor
- Topside / subsea
- Type
- Shock absorber
- Best fit
- Crane shock absorption and overload protection
- SWL
- 75–4,000 t
- Stroke
- 1.0–8.0 m
- Form factor
- Topside
- Type
- Tensioner
- Best fit
- Backup riser tensioning
- SWL
- 350 / 500 t
- Stroke
- 3.0–12.0 m
- Form factor
- Topside
Full lifecycle
From the first drawing to the last decommission.
We support the equipment we build for the entire life of the asset, in-house, with the same engineers who designed it.
Tord Martinsen · Founder & CEOFounder
You may already know our founder's work.
Norwegian Dynamics is a young company; the thinking behind ANTARES, RIGEL, CYGNUS, VEGA, POLARIS and SIRIUS is not. Our founder, Tord Martinsen, has spent his career in motion compensation — first at Cranemaster, then as the original founder of Safelink. He is the inventor of adaptive passive heave compensation, inline active heave compensation and the lightweight shock absorber, and is named on multiple patents in the field. That design experience is the engineering behind the Norwegian Dynamics range — each unit sized from first principles and screened in CONSTELLATION. Recent work includes a 150 t / 4.5 m adaptive compensator for an international offshore EPC contractor and a 3 t / 1.25 m unit delivered in the UK in six weeks.
Why Norwegian Dynamics
Built and supported by engineers.
We design, commission and support heave compensation and shock absorption equipment under one roof. That keeps the feedback loop short: the same team reviews the lift data, equipment, controls and offshore realities.
Designed around DNV-RP-N202 (heave compensating systems) and DNV-ST-0378 (lifting appliances), DNV marine-operation practice and ISO 9001:2015 quality management.
About the company ->Have a lift in mind? Let's find the right compensator.
Send us the basics — SWL, water depth and expected Hs/Tp (a sketch is enough to start). We'll screen the lift in CONSTELLATION and come back with a suitable product, a first operating-window view and the next engineering step.