The owner of a container ship that blocked the Suez Canal in March says the canal authority was at fault over its grounding as it disputes the vessel's detention and a compensation claim, a lawyer representing the owner said on Saturday.

The Ever Given, one of the world's largest container ships, became jammed across the canal in high winds on March 23, and remained grounded for six days, blocking traffic in both directions and disrupting global trade.

The vessel has since been held in a lake between two stretches of the canal as the Suez Canal Authority (SCA) pursues a $916.5 million claim against Japanese owner Shoei Kisen.

An appeals chamber at Ismailia Economic Court held hearings on Saturday over the ship's detention, which the SCA is seeking to uphold following an appeal by the owner, as well as the SCA's financial claim.