The Tynwald is 265 feet long, 34 feet 6 inches beam, and 14 feet 6 inches depth moulded, the gross tonnage being 946 tons.  The desire of the owners to put the vessel alternately on two distinct services required special arrangement of the saloons.  Running between Liverpool and the island there was no necessity for sleeping accommodation, as the passage is made in about three hours; and the ship had to be suited to carry immense crowds.  But as the owners wished on special occasions to run the vessel from Glasgow to Manxland it was necessary to so arrange the saloons as to admit of sleeping accommodation being provided on these occasions.  On the Liverpool run the vessel will carry from 800 to 900 passengers.  A spacious promenade is an indispensable desideratum, and the upper or shelter deck has been made flush from stem to stern, the only obstructions in addition to the engine and boiler casings, and the deck and cargo working machinery, being a small deck house aft with special state rooms, ticket and post offices, and the companion way to the saloons below.  On the main deck forward is a sheltered promenade for second class passengers, while on the lower deck below are dining saloons, the sofas of which may be improvised for sleeping accommodation.  At the extreme after end of the main deck is the first class saloon, with the ladies’ room forward on the starboard side, and, there being no alley way forward, the ladies’ lavatories are provided on the starboard side of the engine casing.  On the port side are the gentlemen’s lavatories, and smoking saloon and bar.  The dining saloon is aft on the lower deck, with ladies’ room forward.  In the two saloons and ladies’ rooms sofa berths can be arranged to accommodate 252 passengers.  The crew and petty officers are accommodated in the forward part of the ship.  As the profile shows, the vessel is divided by transverse bulkheads into seven watertight compartments, and there are double bottoms.  She has six large boats and several rafts.

[Illustration:  THE LIVERPOOL AND ISLE OF MAN TWIN SCREW STEAMER TYNWALD.]

The twin screws are revolved by separate triple expansion engines, steam being supplied by two double-ended boilers.  Each boiler is placed fore and aft, and each has a separate uptake and funnel.  There are three stokeholds, and to ventilate them and supply sufficient air for the furnaces there is in each a 6 foot fan driven by an independent engine running at 250 revolutions.  These have been supplied by Messrs. W.H.  Allen & Co., London.  The boilers are of steel and adapted for a working pressure of 160 lb. to the square inch.  They are 16 feet in diameter and 18 feet long, and there are eight furnaces in each boiler, sixteen in all, the diameter of each furnace being 3 feet 41/2 inches.