Dimensional survey accuracy requirements
Minimum accuracy requirements are defined for the dimensional survey. Higher accuracy will provide better survey results.
The accuracy requirements provided have been determined from considerations on how they contribute to the total MS70 accuracy. Any errors in these measurements should not contribute significantly to depth or position errors in the soundings.
Note
The given accuracies are maximum values. If easily achievable, better accuracies should be obtained.
Transducer
•  Position (x,y): ±0.05 m
•  Position (z): ±0.02 m
•  Pitch: ±0.10°
•  Roll: ±0.025°
•  Heading: ±0.1°
Motion Reference Unit (MRU)
•  Position (x,y): ±0.05 m
•  Position (z): ±0.05 m
•  Pitch: ±0.05°
•  Roll: ±0.02°
•  Heading: ±0.05°
Heading sensor
•  Heading: ±0.1°
Global Positioning System (GPS) (Antenna)
•  Horizontal position (x,y): ±0.05 m
•  Vertical position (z): ±0.005 m
Waterline reference mark
•  Position (z): ±0.005 m