Safety Depth & Safety contour in Ecdis / Difference between safety Depth & safety contour/Alok singh

Описание к видео Safety Depth & Safety contour in Ecdis / Difference between safety Depth & safety contour/Alok singh

what is difference between safety Depth and safety contour
Difference between safety Depth and safety contour
Safety Depth and safety contour in Ecdis
Sea ship and Seafarer
SSS
safety contour

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