Helicopters SAR.

Search and Rescue.

What are the best helicopters employed for search and rescue operations?

The Sikorsky S-61 and Westland Sea King have probably in the British isles been the best to serve in this role. France has used the Super Frelon, Russia and Eastern European countries the Mil Mi-14/17/117. All basically the same machine with additions added on.

First things with SAR is you need range, you also need capacity. It would be no good going out 250 miles to a tanker sinking fast with 17 crew and a SA-365 Dolphin? 

The U.S. have used a variety of machines, but it looks like the S-92H will be the helicopter for the beginning of this century. Meanwhile Canada has joined many other nations in buying the Westland-Augusta AW-101 Merlin.

Construction Vehicles.

The Bulldozer.

All modern construction across the globe today is supported by a series of vehicles to help tear away the earth, to dig, to tunnel underground and erected up to support building up. We cannot live or do anything without machines. 

The bulldozer has been around now for some time, its origins come from the caterpillar tractor of U.S. 1920's. Tracked vehicles work well on rough and unstable ground, but with the introduction of the JCB double powered 4 wheel machines the bulldozer is not now limited just to heavy construction.

A tractor type based on the Unimog multi-purpose off road vehicle has allowed  a more basic machine to expanded into road building scene. but despite this the old bulldozer cannot be done without. Caterpillar in one of the biggest producers in the world. These Cats' are widely used by the military also.

Corvettes and Frigates.

Future?

Which navies around the world still operate Corvettes, and do they not all employ Frigates of varying sizes?  

Since the second world-war (1939-45) many navies have developed greatly with many advances in missile systems over guns and sonar. Meanwhile there has also been many new advances in the gathering of electronic intelligence and systems for counter attack.

What is the differences between a Frigate and a Corvette?
Has it more to do with their role in the theatre of warfare.

Today some navies, if they are not just called defense forces employ the Corvette for inshore patrol, with a bit of a punch. While the Frigate is more of a real warship, missiles, air defenses, Helicopter facility and torpedo tubes.

The Moscow Metro.

Moskva.

Moscow is a great city, it is dominated by the Kremlin and its towers, it is also the capital city of a great and powerful nation, the largest on the earth. For every great city it must have great infrastructure, especially transport networks.

Stalin made sure that Moscow had a good and reliable metro system to match that of London, England and Paris France. This system that was undertaken in the 1930's has withstood the tests of time. 

But he wanted to bring the Russian Imperial court to the people and that is how he did it. Even the trains that have been built over the years have lasted well on the system, comfort, spacious and mechanically efficient.

4X4.

Land Rover.

The four by four off roader vehicle is perhaps one of those mile stones in the invention of human history. A vehicle that is capable of driving over difficult terrain, while also being on a normal tarmac road.

One of the daddies of the 4X4 is the now iconic Land Rover series, from the Mark 1 to the present day Defender. The British Land Rover was based on the chassis of the U.S. Willy's Jeep, which had been around from the 1920's in the United States and nearly never was.

There have since 1948 been many takes on the Land Rover, short wheel base and long and the Australian 110. The Land rover is nearly used by every nation in the world for Police, Internal security, Emergency Services and Military use.

But in the civil role it has been ideally suited for farm work, mountain rescue.