Evaluation.

in my dt class we weere put in groups of 3 in order tyo research and create a marrine vessels of our own.we went on aclass trip to the port to see the different designs of hulls and how the ships were made. As our summative assessment we were assigned to create a marrine vessel that is going to be a solution for our problem. Our problem was to identify a place that has a problem whith piracy and create a marine vessel that is going to help them stop piracy. my group and I chose to do a warship.

In the investigation stage we were to do a problem identification, design brief, research and design specification. The challenges we faced in this stage was when we did the research this was hard for us because the research on marine vessels was not that clear on the issue and also the desiding of what to do and what to make was also a challange. If we had another chance to improve I would research on more about marine vessls to find more information in order to do my research in a proper manner.

In the design stage we also didn’t do well this was because we were doing our work in a rush and we were not able to subbmit at the right time and get the marks that we deserved we had challenges especially when it came to choosing the designs we weren’t creative enough and that cause us to have a problem in the create stage. Justifying my designs was also on of the major challenge we had. If I were to do this stage again I would make sure that I justify my designs and do more research and also use more creativity. Overall I would evaluate this stage as a 3 or 2.

In the create stage I would say that I didn’t have much of a problem because I had all the information I needed but when it came to creating the vessels thts when the problem occured . At first when we wanted to draw the designs on paper we had problems because we had not done our google sketch designs so we had another problem which took us alot of time to resolve but in the long run we still got the designs by the help of our teacher and was able to finish on time.. If I were to do this stage again I would make sure that I am organised in my work and also hand it in on time. Overall I would evaluate this stage as a 3 or 4.

Submarines.

A submarine is a watercraft capable of independent operation below the surface of the water. It differs from a submersible, which has only limited underwater capability. The term submarine most commonly refers to large crewed autonomous vessels; however, historically or more casually, submarine can also refer to medium sized or smaller vessels Remotely Operated Vehicles or robots. The word submarine was originally an adjective meaning "under the sea", and so consequently other uses such as "submarine engineering" or "submarine cable" may not actually refer to submarines at all. Submarine was shortened from the term "submarine boat", and is often further shortened to "sub".DeepFlight Super Falcon, an experimental sub with hydrofoils in 2004. Submarines are referred to as "boats" rather than as "ships", regardless of their size, for historical reasons because vessels deployed from a ship are referred to as boats.[citation needed] The first submarines were launched in such a manner. The English term U-boat for a German submarine comes from the German word for submarine, U-Boot, itself an abbreviation for Unterseeboot.Although experimental submarines had been built before, submarine design took off during the 19th century. Submarines were first widely used in World War I, and feature in many large navies. Military usage ranges from attacking enemy ships or submarines, aircraft carrier protection, blockade running, ballistic missile submarines as part of a nuclear strike force, reconnaissance, conventional land attack and covert insertion of special forces. Civilian uses for submarines include marine science, salvage, exploration and facility inspection/maintenance. Submarines can also be specialized to a function such as search and rescue, or undersea cable repair. Submarines are also used in tourism and for academic research.Submarines have one of the largest ranges of capabilities in any vessel, ranging from small autonomous examples to one or two-person vessels operating for a few hours, to vessels which can remain submerged for 6 months such as the Russian Typhoon class. Submarines can work at greater depths than are survivable or practical for human divers. Modern deep diving submarines are derived from the bathyscaphe, which in turn was an evolution of the diving bell.Most large submarines comprise a cylindrical body with hemispherical ends and a vertical structure, usually located amidships, which houses communications and sensing devices as well as periscopes. In modern submarines this structure is the "sail" in American usage A "conning tower" was a feature of earlier designs: a separate pressure hull above the main body of the boat that allowed the use of shorter periscopes. There is a propeller at the rear and various hydrodynamic control fins as well as ballast tanks. Smaller, deep diving and specialty submarines may deviate significantly from this traditional layout.

Yacht.

A yacht is a high end recreational boat. The term designates two rather different classes of watercraft, sailing and power boats. Yachts are different from working ships mainly by their leisure purpose, and it was not until the rise of the steamboat and other types of powerboat that sailing vessels in general came to be perceived as luxury, or recreational vessels. Later the term came to encompass motor boats for primarily private pleasure purposes as well.
Yacht lengths generally range from 20 feet (6.1 m) up to hundreds of feet. A luxury craft smaller than 40 feet (12.19 m) is more commonly called a cabin cruiser or simply "cruisers." A mega yacht generally refers to any yacht (sail or power) above 100 ft (30.5 m) and a super yacht generally refers to any yacht over 200 ft (61 m). This size is small in relation to typical cruise liners and oil tankers.
Yacht was originally defined as a light, fast sailing vessel used by the Dutch navy to pursue pirates and other transgressors around and into the shallow waters of the Low Countries. They were also used for non-military governmental roles such as customs duties and delivering pilots to waiting ships. The latter use attracted the attention of wealthy Dutch merchants who began to build private yachts so they could be taken out to greet their returning ships. Soon wealthy individuals began to use their 'jachts' for pleasure trips. By the start of the 17th century 'jachts' came in two broad categories- speel-jachts for sport and oorlog-jachts for naval duties. By the middle of the century large 'jacht' fleets were found around the Dutch coast and the Dutch states organised large 'reviews' of private and war yachts for special occasions, thus putting in place the groundwork for the modern sport of yachting. Jachts of this period varied greatly in size, from around 40 ft (12 m) in length to being equal to the lower classes of the ship of the line. All had a form of fore/aft gaff rig with a flat bottom and lee boards to allow operations in shallow waters. The gaff rig remained the principal rig found on small European yachts for centuries until giving way to the 'Bermudan sloop' rig in the 1960s.

Fishing Boat.

Boats have served as short distance transportation since early times. Circumstantial evidence, such as the early settlement of Australia over 40,000 years ago, suggests that boats have been used since very ancient times. The earliest boats have been predicted to be logboats. The oldest boats to be found by archaeological excavation are logboats from around 7,000-10,000 years ago. The oldest recovered boat in the world is the canoe of Pesse; it is a dugout or hollowed tree trunk from a Pinus sylvestris. According to C14 dating analysis it has been constructed somewhere between 8200 and 7600 B.C. This canoe is exhibited in the Drents Museum in Assen, Netherlands. Also other very old dugout boats have been recovered. though a 7,000 year-old seagoing boat made from reeds and tar has been found in Kuwait. Boats were used between 4000BCE-3000BCE in Sumer, ancient Egypt and in the Indian Ocean. Boats played a very important part in the commerce between the Indus Valley Civilization and Mesopotamia. Evidence of varying models of boats has also been discovered in various Indus Valley sites.The accounts of historians Herodotus, Pliny the Elder, and Strabo suggest that boats were being used for commerce and traveling.

Hi welcome, my name is Maureen Mulinge and am going to be talking to you about Marine Vessels.Marine vessels are vessels that work with water e.g. ships,fishing boats,submarines,yatches and so many other types .today am going to talk about four of them which are ships, boats, submarines and yatches.

1. Ships
2. A ship is a large vessel that floats on water. Ships are generally distinguished from boats based on size and cargo or passenger capacity. In traditional terms, ships were considered to be vessels which had at least one continuous water-tight deck extending from bow to stern. However, some modern designs for ships, and boats, have made that particular definition less accurate. Ships may be found on lakes, seas, and rivers and they allow for a variety of activities, such as the transport of people or goods, fishing, entertainment, public safety, and warfare.In major wars, and in day to day life, they have become an integral part of modern commercial and military systems