74282 jsc0920015

Ostrów II

length    234.93 / 255.00 m - after rebuilding in 2000

outer width    53.01    m

inner width    45.21    m

clearance    44.00 / 44.40 m - after 2004

pontoon height    4.80    m

total height    17.97    m

freeboard    0.20    m

max submersion of docked ship    9.40    m

max beam of docked    ship    44.00    m

dock capacity    33,000 l / 36,0001 - after rebuilding in 2000

dock weight max trim max heel

max dock deflection submersion time of empty deck emersion time of loaded dock eąuipment:

Technical data j*

12,696 t

3.10 m on length 255.00 m 0.90 m on with 45.00 m +0.19 / -0.20 m 1 h 50 min about 3 h

6 main pumps of capacity 3,600 m³/h each, 2 fire fighting pump of capacity 120 mTh each 12 main gate valves diameter 600 mm 24 regulating valves diameter 350 mm 2 cranes of capacity 5 / 25 t dock winch of towing power 10 t

Due to safety reasons the underwater part of hulJ of any ship has to be periodically maintained. There also happen damages and failu-res of the submerged part of the ship or the owners decide to re-build the units. Nonę of these operations can be done without emerging the ship from water. Tt can be done on land or the ship can be docked in a dry dock and the water pumped out. But the cheapest and easiest method is towing the ship on to submerged floating dock and then emerge the dock.

First floating dock was madę al-most 250 years ago from a rebu-ilt wooden ship Camel. Her deck was taken off and a waterproof gate was mounted instead of the cut Stern. After filling the hull with water the repaired ship was pulled into it, the gate was clo-sed and the water pumped out.

In this way the underwater part of the hull was accessible. The idea of rebuilding the Camel was introduced in many shipyards all over the world. One of first docks was built in 1851 in Gdańsk and was in service for many years.

The construction of the dock was changed sińce past centuries -modem docks do not have gates and the submersion and emersion can be done thanks to filling or empting the ballast tanks in the hull and the side walls. As the docks are not closed with gates, it is possible to dock ships longer than the docks. To get easy access to the horizontal part of the ship’s bottorn, special supports (called

keel blocks) are placed on the dock’s deck before submersion. During emersion the repaired ship leans on these supports. Pole or cradle scaffolds enable the workers access to each part of the hull skin. The docks are also equ-ipped with cranes and terminals of current, compressed air and technical gases.

Floating dock Ostrów II was built in 1987 at MAN - Gutehoff-nungshiitte shipyard, Blexen at river Weser mouth, Germany. After towing to Gdańsk she was placed on deep water at northern point of Ostrów island. In 2000 the dock’s length was inereased on water at 20 meters. During this operation the dock was also trimmed so that the connections were madę above water. In 2004 the tender beams inside the dock were madę morę narrow to inerease the maximum width of docked ships.

The presented model of floating dock is meant for docking operation of Willift Eagle model (JSC model no. 90). For docking any other unit the positions of keel and side supports have to be changed.

ASSEMBLING INSTRUCTION

Auxiliary materials and tools

To assemble the model you will need: smali scissors, pincers, craft knife, thin metal wire, ruler, good paper glue, thin thread and paints to touch up white edges.

All parts should be cut out carefully along their outline. Tiny and morę complicated parts should be cut out by means of craft knife. Score folding lines with a blunt knife and a ruler. This allows as-sembling even very smali parts as solids.

Iniportant! Following symbols are marked on the parts: ńght (R) and left (L) side, openings to be cut out (£<) and direction to bow or upwards (—►). Openings should be madę before cutting the part out.

Bend triangular and trapezoid tabs to the unprinted side and rectan-gular tabs shoukhTt be bent at all (usually they are at rolled parts). Numbers of parts are marked black, parts to be glued in marked position - grey. Parts with underlined numbers should be glued on 1 mm thick cardboard.

Assembling instruction

1-3 Main deck. Cut out parts 1-3 and glue them on one piece of cardboard (if needed on cardboard pieces, but the joints should be as far as possible from the joints of parts 1-3 and at the same time as close as possible to the dock\s ends). Keep the dock’s deck fiat during stiffening it.

4-16 Side walls of the dock. Cut out openings marked with scissors in parts 4, optionally the grey openings in the fore part may be cut out. Now cut out parts 4 (cut slots where marked with arrows) and assemble as boxes (Fig. 1). In similar way assemble the rear side walls 5. Assemble the central parts of side walls 6-7 as boxes. Assemble parts 8 as solids and glue the inside fore parts of 4. Assemble parts 9 in the same way and glue them into after parts of walls 5. Glue gangways 10 in pairs and glue them on the slope betwecn parts 8 and 9, and with openings in the side walls’ decks. Assemble parts A out of wire and glue them into the ends of the side walls. Form frames 11 with colour inwards and glue them into the openings in the side walls (place them from the side of the white walls). Glue together ready side walls - place them on a fiat surface and keep them straight. Glue parts 12-14 on the white walls and move the parts towards upper edges of the side walls - bottom edges of parts 12-14 protrude about 1 mm below the bottom edges of the side walls (s. section A-A). First glue parts 12 and 13 fitting them to the openings in the side walls and then fit (without glue) to the model central parts 14. Cut the possible length excess and glue the parts. Finally close the side walls with pairs of parts 15 (from the side of bow - closer to the inscription on the side ) and 16 (from the side of stem). Glue the assembled side walls on the main deck. 17-20 Sides. Wrap strip 17 around the fore edge of deck, strip 18 around the after one, wrap strips 19 around the elamps that protrude to the portside and strip 20 around the platform that protrudes to the starboard.

21-23 Upper deck. Glue decks 21-23 on the side walls and make even their outer and side walls edges (the decks protrude out of the side walls towards the inside of the dock). Before gluing decks 23 make in them openings for the gangplanks axles, check if they fit (fit the parts to the openings for gangways) and cut the possible length excess.

24-36 Eąuipment of side walls. Assemble fender beams 24 with