Fishing Vessel 

Introduction of fishing vessels , history , stability ,trawler types , factory ship and outfitting for fishing vessels .

1. Fishing Vessel
REPRESENTED BY :
Ahmed Taha

2. INTRODUCTION
Afishing vesselis aboatorshipused to catch fish in the sea, or on a lake or river .
According to theFAO(Food and Agriculture Organization)
, there are currently (2004) four million commercial
fishing vessels

3. HISTORY
Early fishing vessels includedrafts, boats
constructed from a frame covered withhide
ortree bark
Around 4000 B.C.,Egyptianswere building
long narrow boats .
They developed cotton-made sails to help their boats go faster
with less work.
Then they built boats large enough to cross the oceans. These
boats had sails, and were used for travel and trade

4. HISTORY
An example of their skill is theKhufu ship, a vessel 143
feet (44m) in length entombed at the foot of theGreat
Pyramid of Gizaaround 2,500 BC and found intact in
1954.

5. HISTORY
Steam power
The earliest steam powered fishing boats first appeared in the
1870s and used thetrawlsystem of fishing as well as lines and
drift nets.
These were large boats, usually (24–27m) in length with a beam of
around (6.1m).
They weighed 40-50 tons and
travelled at 9–11 knots (17–20km/h

6. Trawler designs adapted as the way they were powered changed from sail
to coal-fired steam by World War Itodieselandturbines
by the end ofWorld War II.
HISTORY

7. FISHING SHIP VS SPY SHIP
In recent decades, commercial fishing vessels have been increasingly
equipped with electronic aids, such asradio navigation aidsandfish
finders. During theCold War, some countries fitted fishing trawlers with
additional electronic gear so they could be used asspy shipsto monitor
the activities of other countries.

8. COMMERCIAL VESSELS
Commercial fishing vessels (Fishing trawler) can be classified by :
1.Architecture
2.the type of fish they catch
3.the fishing method used.

9. FISHING TRAWLER
Afishing trawler, also known as adragger, is a commercialfishing
vesseldesigned to operatefishing trawls.
Trawling is a method of fishing that involves actively dragging or pulling a
trawl through the water behind one or more trawlers.
Trawls arefishing netsthat are pulled along the bottom of the sea or in
midwater at a specified depth.
A trawler may also operate two or more trawl nets simultaneously (double-rig
and multi-rig).

11. TRAWLING GEAR
There are many variants of trawling gear. They vary according to
1.local traditions
2.bottom conditions
3.how large and powerful the trawling boats are.
A trawling boat can be a small open boat with only 30horsepoweror a
largefactory shipwith 10,000horsepower.

12. Modern trawlers are usuallydeckedvessels.
Theirsuperstructure(wheelhouse and
accommodation) can be forward, midshipor
aft. Motorizedwinches,electronic
navigationandsonarsystems are usually
installed.
Fishing equipment varies in sophistication
depending on:
1.the size of the vessel .
2.the technology used.
TRAWLING GEAR

13. TRAWLER TYPES
The classification used below follows theFAO, who classify trawlers by the gear they use
Outrigger trawlers
Beam trawlers
Otter trawlers
Pair trawlers
Side trawlers
Stern trawlers
Freezer trawlers
Wet fish trawlers
Trawler/purse seiners
Naval trawlers

14. ALASKA RANGER
Alaska Rangerwas afishingfactory shipowned and operated by the Fishing Company of Alaska
ofSeattle, Washington.
The ship was constructed in. The ship sank 23 March 2008, after reporting progressive flooding only
hours earlier. Of the 47 on board, 42 were rescued. Of the five fatalities, four were recovered dead, and
one was never found 

17. STABILITY
Loose Water or Fish on Deck

18. Loading and unloading operations have a dramatic effect
on stability.
For example, when a heavy load is lifted clear of the
water it has the same effect on the vessel’s centreof
gravity as if the weight were actually at the head of the
boom. The vessel will also heel.
All such operations should proceed with extreme
caution.
Loading and Unloading
STABILITY

19. Icing Conditions
Heavy icing, especially when it accumulates, will seriously
affect stability.
In severe conditions it is very dangerous. If icing occurs, all
fishing gear should be recovered and secured as low as
possible on deck.
Speed should be reduced, and the vessel turned downwind if
possible. If crew are sent on deck, they should have safety
lines attached. If possible, ice should be
removed from upper structures.
STABILITY

20. Freeboard
If the deck edge goes under the water when
the vessel heels, the danger of capsizing is
great.
An overloaded vessel will have too low a
freeboard.
The deck will submerge with even a slight
heel.
Overloading is a major cause of fishing vessels
capsizing.
STABILITY

21. ANCHORS AND CABLE
The weight of anchor you need depends on the length, breadth and depth of the vessel.

22. THE WORLD'S LARGEST FISHING VESSEL
The world's largest fishing vessel, the factory freezer ship Lafayette, has turned
up in Pacific waters east of Australia.
The controversial 49,000-tonne Lafayette, and six attendant trawlers,
registered on satellite-tracking systems north-east of Norfolk Island on Friday.
Onboard the Lafayette, the fish are first deposited in one of 32 refrigerated
primary holding tanks, each with a 10,000 cubic meters capacity. It can
support much as 7000 tons of fish in freezing waters. From there, a vacuum
pump sucks the fish from the holding tanks and dumps them on one of three
large hoppers. These hoppers then lift the catch up onto a fish grading system.

24. TUNA

25. REPRESENTED BY :
Ahmed Taha