
34
the down-looking beam set is the forward beam on the starboard side.
25. BtRnge2 (m) – The tilt corrected vertical range between the vehicle and the location of where beam 2 is
hitting the bottom. Beam 2 on the down-looking beam set is the back beam on the starboard side.
26. BtRnge3 (m) – The tilt corrected vertical range between the vehicle and the location of where beam 3 is
hitting the bottom. Beam 3 on the down-looking beam set is the back beam on the port side.
27. BtRnge4 (m) – The tilt corrected vertical range between the vehicle and the location of where beam 4 is
hitting the bottom. Beam 4 on the down-looking beam set is the forward beam on the port side.
28. BtXWaterSpd (m/s) – The forward speed of the vehicle from water tracking. The DVL is capable of only one
tracking algorithm at a time. If bottom tracking is active then water tracking is turned off and this column
will be filled with 999.999s. Water tracking is like bottom tracking, but instead of the bottom, a fixed volume
of water is used as the velocity reference. A negative value indicates forward progress. Water tracking is only
used when the bottom is out of range.
29. BtYWaterSpd (m/s) – The lateral speed of the vehicle from water tracking. A negative value indicates the
vehicle is moving in the starboard direction.
30. BtZWaterSpd (m/s) – The vertical speed of the vehicle from water tracking. A positive value indicates the
vehicle is moving upward.
31. BtWaterQuality - The water track quality. This value is a percentage divided by 10. This percentage is the
amount of the water tracking cell that is usable (above the sea floor). When this value is zero, bottom
tracking is being used.
32. VtXspd (m/s) – This is the forward speed of the vehicle as computed from the “bottom” tracking of the up-
looking beams. This feature is under development mainly for under ice application and should be used with
caution. This column is filled with 999.999s when the surface is out of range (too close/far.)
33. VtYspd (m/s) – This is the lateral speed of the vehicle as computed from the “bottom” tracking of the up-
looking beams. This feature is under development as surface tracking mainly for under ice application and
should be used with caution. This column is filled with 999.999s when the surface is out of range.
34. VtZspd (m/s) – This is the vertical speed of the vehicle as computed from the “bottom” tracking of the up-
looking beams. This feature is under development as surface tracking mainly for under ice application and
should be used with caution. This column is filled with 999.999s when the surface is out of range.
35. VtQuality – The up-looking surface tracking quality. This is a quality score for the surface tracking solution.
A “9” is a 4-beam surface tracking solution. A “7” is a 3-beam surface tracking solution. A zero is no surface-
track at all. Other numbers are unused at the moment.
36. VtRnge1 (m) - The tilt corrected vertical range in meters between the vehicle and the location of where beam
1 is hitting the surface. This is not the along beam range, but the vertical range to surface. Beam 1 on this up-
looking beam set is the forward beam on the port side. The up-looking range to surface is 999.999s when the
surface is out of range.
37. VtRnge2 (m) - The tilt corrected vertical range to surface in meters. The distance between the vehicle and the
location of where beam 2 is hitting the surface. Beam 2 on this up-looking beam set is the rear beam on the
port side. The up-looking range to surface is filled with 999.999s when the surface is out of range.
38. VtRnge3 (m) – The tilt corrected vertical range to the surface in meters. Beam 3 is the up-looking rear beam
on the starboard side. This column is filled with 999.999s when the surface is out of range.
39. VtRnge4 (m) – The tilt corrected vertical range to the surface in meters. Beam 4 is the up-looking forward
beam on the starboard side. Up-looking range is filled with 999.999s when the surface is out of range.
40. VtXWaterSpd (m/s) - The forward speed of the vehicle from up-looking water tracking. The DVL is capable
of only one tracking algorithm at a time. If surface tracking is active then water tracking is turned off and
this column will be filled with 999.999s. Water tracking is like surface tracking, but instead of the surface, a
fixed volume of water is used as the velocity reference. A negative value indicates forward progress. This will
only be used when the surface is out of range.
41. VtYWaterSpd (m/s) - The lateral speed of the vehicle from up-looking water tracking. If surface tracking
is active then water tracking is turned off and this column will be filled with 999.999s. A negative value
indicates motion to starboard.
42. VtZWaterSpd (m/s) - The vertical speed of the vehicle from up-looking water tracking. If surface tracking is
active then water tracking is turned off and this column will be filled with 999.999s. This will only be used
when the surface is out of range.
43. VtWaterQuality - The up-looking water track quality. This value is a percentage divided by 10. This
3.7