The bioscope is tilted – what should I do?

Click here to go directly to the adjustment: Step by step guide

1. Pitch and Roll – Quick Explanation

• Pitch: Rotation forward or backward 

  • Positive: front points down

  • Negative: front points up

• Roll: Rotation side to side

  • Positive: right side down

  • Negative: left side down

• Measured in degrees (°) – provides an overview of bioscope stability

Why it is important:
Stable pitch and roll ensure accurate measurements. Large deviations can cause:

• Incorrect or inaccurate measurements

• Discarded data

2. Limits

• Pitch: optimal between ±5°

• Roll: optimal between ±5°

• Adjustment should be performed if values exceed ±10°

If pitch or roll exceeds ±30°, the measurements will automatically be discarded.
To ensure data quality, it is strongly recommended to adjust the bioscope when values exceed ±10°, as even moderate deviations (between 10° and 30°) can affect accuracy.

3. Step-by-Step: Adjusting Pitch and Roll

 Pitch

Positive pitch - bioscope tilts forward

• Check that the sea cable is not too tight or stuck

• Adjust the sea cable with enough slack

• If this doesn’t help: lift the bioscope, adjust the ropes, and redeploy it

Negative pitch - bioscope tilts upward 

• Check that all ropes hang straight with no knots

• Lift the bioscope, adjust the ropes, and redeploy it

Roll

• Check that the suspension ropes have equal length on both sides

• The ropes have markings every 5 meters to ensure even length

  • Bioscope tilts to the left - negative roll

• • Bioscope tilts to the right - positive roll

After adjustment, check in the portal whether the pitch and roll are within the limit values. Repeat if necessary.