DP11 Limitation (Dynamic Positioning system in AHTS Vessel)

Dear All Experts,, could you please inform is there any swell/wave limitation for using DP 1
system in AHTS vessel? Currently we are having bad weather in our area and the swell is reaching 2.7 to 3.0 meter. Our AHTS Vessel are equipped with DP 1 system however they reject to use the DP 1 system because the swell is already to high (2.7-3.0 meter).
Thank You.

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