Den Norske Stats Oljeselskap A.s.

Nic Ward

Per Magnus Sparrevik

Andy Walker

Device for subsea metrology of distance and relative orientation of a first termination ( ) with a local reference system (x , y , z ) and which by means of a jumper spool piece ( ) is going to be connected to a separate second termination ( ) having a local reference system (x , y , z ), characterized by a base metrology unit ( ) arranged for being carried by an ROV ( ), and arranged for aligned arrangement with the second or the first termination's ( ) reference system, and comprising the following features: a wire ( ) with an extractable first end ( ) being arranged for being attached to a receptacle device ( &prime;) arranged on the termination ( ) for receiving the wire's ( ) first end ( ) or a metrology unit and with a wire tensioner device ( ) arranged for tensioning the wire ( ) between the base metrology unit ( ) and the receptacle device ( &prime;); a wire length sensor ( ) arranged for measuring the length (D ) of the extended taut wire ( ); a relative azimuth sensing device ( ) arranged to measure &lsqb;and store&rsqb; the relative azimuth (&thgr; , &thgr; ) value of the taut wire ( ) with respect to the base metrology unit's ( ) mainly horizontal axes (x , y ); and a submerged-depth sensor ( ) arranged for measuring the submerged depth (d ) of the base metrology unit ( ).

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Hampshire, United Kingdom

Nic Ward