Complex sentence: The vessel was described carried away up on the beach and left there high and dry by the receding tide she was found so far away from water that it will be necessary to dig a channel especially for her to be launched by means of towing power.
Split into simpler sentences: The vessel was described to be carried away up on the beach and left there high and dry by the receding tide. She was found so far away from water that it would be necessary to dig a channel especially for her to be launched by means of towing power.