Page 37: of Maritime Reporter Magazine (July 2017)
The Marine Communications Edition
How it Works all directions,” said Kusters, “from folks tureWaves, they are braced for a strong technology,” says Kusters, “we expect
At the core of the FutureWaves sys- involved in offshore construction, pro- pull from industry. They are managing the same from the commercial side. We tem are several key enabling technolo- duction, and logistics support. Again, it strong interest from offshore oil and re- can envision a future where this technol- gies developed by GD-APS. The ? rst comes back to enhanced safety of op- newables, and starting to engage with ogy is a vital component of the naviga- is a customized X-band Doppler radar erations, and expanding the operating the cruise and commercial shipping in- tion tool suite expected on every ship’s capable of sensing inbound ocean wave envelope.” While GD-APS is just now dustries. “As the Navy continues to pull bridge.” www.APhySci.com motions out to ranges approaching 5 km. engaging the commercial market for Fu- for ever-expanding applications of this
The radar’s azimuthal sweep rate and range resolution are set to adequately sample the local wave? eld in space and
Innovation | Safety | Performance time. Doppler scans are fed into a suite of real-time ? ltering and processing al- gorithms that translate the radar data
STATUTORY COMPLIANCE FOR TANKERS into forecasts of surface wave elevation maps and ship hull forces. The radar-to- wave processing scheme uses an innova- tive least squares inversion to determine the underlying propagating components of the wave ? eld, and these waves are evolved forward in time according to ocean wave propagation physics. A pre- calculated database of wave interaction forces with the ship is used to produce a
DIRECT DAMAGE STABILITY
TM rapid prediction of the ship’s motion that
TM & CargoMax will be induced by the predicted wave forcing. These continuously updating ship motion predictions can then be used to inform the timing of ship operations.
USER DRIVEN | ENDORSED WORLDWIDE: Herbert-ABS
Although maximum forecast time var-
CargoMax systems with the Direct Damage Stability ies with sea condition and vessel speed, option have been approved by IACS Classifcation the FutureWaves system has been dem-
Societies for decades. Meet the new IMO MARPOL, IBC, onstrated to provide accurate, phase-re-
BC, GC & IGC requirements for mandatory verifcation solved wave and ship motion forecasts to instruments onboard new and existing tankers. several minutes into the future.
The system also produces a directional power spectrum of the ocean waves, a map of where the wave energy is com- www.herbert-abs.com ing from and at what wave period. This wave spectrum data is fed to the ship motion model to produce a plot of the statistical representation of the ship mo- tions as a function of ship heading and speed, allowing selection of ship orien- tation to minimize particular modes of motion. This planning tool is continu- ously updated from the radar-calculated directional power spectrum, and can also be fed wave spectrum forecast products STOCK (Purchase and Rental): s