tweendeck

Beneath the tweendeck is the hold space, used for general cargo.

The damaged steel structures were cut at tweendeck level and the 120 mm deck guns were removed.

Cargo 'tweendeck spaces were insulated for the carriage of fruit, with certain compartments for chilled and frozen produce.

The ships can carry roll-on/roll-off cargo on the continuous tweendeck between holds No. 2 and No. 5.

The upper deck is called the main deck or weather deck, and the lower deck is the tweendeck.

Cargo such as bales, bags, or drums can be stacked in the tweendeck space, atop the tweendeck.

In addition the ships can carry special ten-foot ore concentrate containers in holds No. 2, 3 and 4, with two layers on tank top and one on tweendeck.

Longitudinal framing is used except in the side area between double bottom and tweendeck, which has transverse framing to improve the distribution of ice loads on the side shell.

On the continuous tweendeck the ship could also carry roll-on/roll-off cargo which was loaded and unloaded via a stern quarter ramp that could also be lowered directly on ice.

If done, it would consist of removing all cargo handling gear ahead of the superstructure and cutting the hull down to the tweendeck in order to create a large level cargo deck for the oversized industrial modules.

The work, which began in late 1930 and continued until November 1931, included replacing part of the bottom plating, building an additional tweendeck, refurbishing the rigging, painting the whole ship and rebuilding her cargo holds to accommodate up to 180 men.

The tweendeck hatch covers were changed from wire-operated to hydraulic and, due to the rearranging of the aft deck winches and to ease the handling of mooring lines, the aft hatch was made slightly smaller than in the original ships.

The first bomb missed the icebreaker and exploded harmlessly on ice in front of the ship, but the second hit the foredeck, destroying the anchors, and the third penetrated the wooden weather deck in front of the bridge and detonated on the tweendeck.

Although the engine rooms, boiler rooms and machinery workshops remain largely in their initial configuration and one officer cabin on the tweendeck was spared by the fire in the 1940s, the aim of the restoration work was never to return Tarmo to her original condition.