Tes Formatif Kegiatan Belajar
57 the tug, which are of growing importance, are coastal tugs and ocean-going tugs.
These go out to help ships in difficulty at sea. Tugs must be designed to satisfy three important requirements. They must be stable in all conditions. They must
also be manoeuvrable and be powerful enough to move ships of far greater size. A rather noisy and smaller type of vessel is the dredger. Dredgers are necessary to
remove the sand and mud from the beds of channels and harbours. Dredgers are of three main types; they can be either bucket dredgers, which have a series of
buckets which go down to the sea bed and scoop up the sand and mud; they can be suction dredgers, which suk up sand and mud like a very large vacuum cleaner;
or they can be grab dredgers, which operate like cranes. Another type of special duty vessel is the icebreaker. Icebreakers are important to
shipping because northern ports and channels freeze up in winter. Ships must use these ports all the year around, therefore it is necessary to keep the open.
Icebreakers have powerful engines and very strong hulls. An unsual type of vessel is the lightship. Lightships look like ordinary ships, but
they do not have engines because they are towed into position and the anchored there. They not only have light, but also a foghors, a radio beacon and
meteorological equipment as well. Most lightships have a crew of approximately twelve.
A very important type of boat is lifeboat. Lifeboats are of many different types. In the United Kingdom they are manned by volunteers and supported by voluntary
donations. Lifeboats must be strong, stable and manoeuvrable and their crew must be well trained.
Finally, there is the pilot launch. Pilot launches are motor boats for transporting pilots to and from ships. The must be seawothy as pilots go out in all weathers. In
the United Kingdom, some port authorities employ their own pilots, but many pilots are employedby Trinity House, which was founded in 1514.
58 Exercise 1. Expand these notes into full sentences:
1. Tugs - 4 basic types i river, ii coastal, iii harbr, iv ocean-going.
2. Dredgers remove sand mud fro chnls hrbrs.
3. Icebreakers import N ports chnls frze winter.
4. Lightships look like ord ships BUT no eng towd postn anchrd.
5. Lifeboats - many types. In UK manned by vols supp by voltry dons.
6. Pilot launches = mtr boats for transport pilots to fro ships.
Exercise 2.Try and reduce these sentences to note form:
1. Tugs must be stable in all conditions, manoeuvrable and have sufficient power.
2. Dredgers are of three main types: they can be either bucket dredgers, suction
dredgers or grab dredgers. 3.
Ships must use these ports all the year round, therefore it is necessary to keep them open.
4. Lightships not only have a light, but also a foghorn, a radio beacon and
meteorological equipment. 5.
Lifeboats must be strong, stable and manoeuvrable and their crew must be well trained.
6. Pilot launches must be seaworthy as pilots go out in all weathers.