Complex sentence: To avoid liability, classification societies explicitly disclaim responsibility for the safety, fitness for purpose, or seaworthiness of the ship, but is a verification only that the vessel is in compliance with the classification standards of the society issuing the classification certificate.
Split into simpler sentences: To avoid liability, classification societies explicitly disclaim responsibility for the safety, fitness for purpose, or seaworthiness of the ship. It is an attestation only that the vessel is in compliance with the classification standards of the society issuing the classification certificate.