This article contains numerous errors. Replying on the Marconi chart is a mistake as it only account for predicted ship movements, and the coal strike in England had put paid to many ship's steaming plans. For instance, the SS Lake Champlain was still in Liverpool on April 17th, having arrived there from Quebec the previous December. This is confirmed by Lloyd's copious shipping information.
I agree wholeheartedly with Mr. V.Brand's assessment of this article. It is rife with errors, as are countless others on this site. In fact, many of them are written so poorly that reading them is a painful and nearly impossible task. I'd strongly recommend that the supervisors of this website invest heavily in acquiring a team of writers who are capable of stringing together a coherent sentence.