Acoustic underwater positioning and navigation systems HiPAP and HPR

The systems use an antenna (the transducer) fitted into the vessel hull containing both a transmitter and a receiver. A signal (pulse) is transmitted aimed at a seabed transponder. The pulse activates the transponder, which will respond with a replay. The vessel transducer with corresponding electronics will calculate an accurate position of the transponder relative the vessel.

Typical problems for underwater positioning and navigation

Sound waves do not follow a straight path. Deflection occurs when the sound passes through different thermo clines in the sea. Thermo clines are a result of differences in temperature and salinity. The velocity of sound varies accordingly to these factors, and shadow zones can occur. Another problem with sound in water is noise generated from the vessel itself and surrounding objects.

Three principles

Our family of underwater positioning and navigation systems use three different principles for measurements and calculations.

SSBL - Super Short Base Line

Here the calculation of positioning is based on range, and on vertical and horizontal angle measurements, from a single multi element transducer. The system provides three-dimensional transponder positions relative to the vessel.

SBL - Short Base Line

The calculation of position is based on range, and vertical and horizontal angle measurements from a minimum of three hull mounted transducers. The system provides three-dimensional transponder positions relative to the vessel.

LBL - Long Base Line

The calculation of position is based on range measurements only. The vessel is positioned relative to a calibrated array of transponders.

Combined mode systems

Any combination of the three principles above secures flexibility as well as a high degree of redundancy and accuracy.

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Hagi Academy , junior kings of Romania

After successes in 2012 and 2013 Football Academy "Gheorghe Hagi " and he wins third consecutive title at junior after success Thursday night 1-0 ( Bogdan Vasile 75 pen. ) In front of the University Cluj . Although Cluj were those who were leaving the first chance , the experience gained in recent years proved decisive in the end . Champion Junior B competition in 2013 , Hagi Academy kids relapsed this season . Vasile Bogdan 's goal decided the fate of the meeting and a championship in which students Cristian Camu , found himself third consecutive title at junior , also had the disadvantage of being a year younger than the other players . " The joy was even greater than in previous years because , to our knowledge , is unique in Romanian football as a team to win three national titles in junior with the same coach. It is something special, especially since most of the players born in 1995 were promoted to the first team . I had lot players from groups 1996, 1997 and even 1998 , "said head coach Cristian camu . He believes that , at this point , Academia Hagi is superior clubs in the country. " We work hard . There are teams that found themselves lately, but we are still far above them. This is proved by the results. Personally, it is a satisfaction and a joy , a fulfillment of the work in three years . Players like Florin Tanase Ionut Cristian Manea and Mitre confirmed to seniors . They expect to confirm more and all the national teams , "he said camu .

After final award ceremony took place in which they were awarded two special prizes , both obtained from Constanta players . Catalin Cabuz received the trophy for " goalkeeper final " ( trophy awarded by Dumitru Moraru ) and Adrian Boit was named " best player in the finals " ( trophy awarded by Ion Vlădoiu ) , the very day that celebrated 19 years

Here they are and those who have contributed to achieving the season 's third national title at junior Cristian Camu - coach, Emil Dobre - goalkeepers coach , Gabi Zacharias - physical coach , George Falin - team manager Lucian Burchel - technical director ; Lot of players used during the championship : Cabuz Catalin Andrei Rotariu Arpad Tordai - janitors ; Acostachioaie Razvan Razvan Babu , Boerean Florin Adrian Boit , Tiberiu tongs butcher Carlo Florinela Coman Alexandru Cicâldău , Cioablă Florin Andrei Ciobanu, Antonio Cruceru , Gabriel Deac, Cristian Ene , Daniel George, Robert Hodorogea , Paul James, Szabolcs Kilyen Cristian Manea, Marin Razvan Dragos Nedelcu , John Opriş , Elvis Otei Ionut Panţîru , Perju Ciprian Alexandru Stoica , Catalin Torişte George Tudoran Bogdan Vasile , Bruno Vasiu Ionut come Vlădescu Andrei Cosmin Achim , Julian Carabela - players field . Medical staff : George Puflene , Alexandru Petcu - doctors, Cosmin Sirbu, Silviu Botea - physiotherapists .

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