HiPAP® 350P is the only automatic beam steering portable transducer on the market and is an ideal tool for the ‘Vessel of Opportunity’ due to its ease of transport and set-up. With its new, unique and compact transducer accompanied by a built-in accurate Motion Reference Unit, HiPAP® 350P can be used on almost any vessel at short notice. The transducer is designed to be mounted on a shaft to be installed over-the-side or through a moon-pool of a vessel. With its 345 mm diameter transducer head, it can also penetrate all existing 12 inch / 350 mm gate valves. The system uses unique narrow pointing beam technology, to minimize the effect of noise from noise sources such as propellers and thrusters. The 46-element transducer creates a narrow beam of +/- 7,5 degrees, which can be pointed towards the transponder(s) in any direction within a 120-degree cone below the vessel. The operational area can easily be extended or changed by simply mounting the transducer on a tilted bracket, facing the sector to the wanted area. There is no need for extra calibration, or mechanical fine adjustments, as the internal Motion Reference Unit will automatically compensate for the tilt.
New low frequency HiPAP®
HiPAP® 100 is the new and Low Frequency member of the HiPAP® system family. With high accuracy, good repeatability and high reliability, the HiPAP 100 system is the multi-purpose acoustic positioning system for ultra deep water operations. The HIPAP® 100 system is supplied as an ‘ultra deep water’ version using transponders for high water pressure. Transponders with depth rating down to 6500 m are available. The HIPAP® 100 is well proven, and it provides the simplest way to position ROVs and other objects in very deep water. The beam forming, signal detection and digital signal processing are based on the same principles as the other well proven HiPAP® family members. The elements are all computer-controlled and the system will dynamically control a narrow listening beam towards the transponder(s), minimizing the noise influence from the vessel’s thrusters and propellers.
HiPAP® was first developed with the focus of using the Super Short Base Line (SSBL) principle, as the market requirement was to try to avoid the Long Base Line (LBL) principle in deep water accurate seabed survey applications. The main advantage of the SSBL principle is that it only requires installation of one vessel-mounted transducer and one subsea transponder. The unique transducer technology along with advanced digital signal processing of HiPAP® has been proven to obtain optimal position accuracy. The HiPAP® series of transducers features many more elements than any of its competitors. This provides increased acoustical redundancy, mathematical redundancy and improvement of the Signal to Noise level. All HiPAP® systems can now also install a Long Base Line functionality providing the operator fl exibility when this is required. All HiPAP® systems use the same Acoustic Positioning Operating System (APOS) and Man Machine interface. The APOS consists of a Color Display, an Acoustic Positioning Computer (APC), Keyboard and tracker-ball.
August 30, 2006