Why did M Morrel jump into a boat and row towards the Pharaon?

In Chapter One, Monsieur Morrel, rows up to the Pharaon because he senses that something went wrong during the voyage from Smyrna.

However, those experienced in navigation saw plainly that if any accident had occurred, it was not to the vessel herself, for she bore down with all the evidence of being skilfully handled, the anchor a-cockbill, the jib-boom guys already eased off, and standing by the side of the pilot, who was steering the Pharaon towards the narrow entrance of the inner port, was a young man, who, with activity and vigilant eye, watched every motion of the ship, and repeated each direction of the pilot.

The vague disquietude which prevailed among the spectators had so much affected one of the crowd that he did not await the arrival of the vessel in harbor, but jumping into a small skiff, desired to be pulled alongside the Pharaon, which he reached as she rounded into La Réserve basin.