A diving bell must be able to withstand monstrous pressures. Therefore, the exterior has to be of high tensile metal or carbon composites. An artificial atmosphere is necessary as well as advanced communication features.
Diving bell spider was created in 1758.
In 1616, the German inventor Kessler introduced his diving bell with glass ports
Eads
It is a device that looks like a bell and helps you dive into very deep places. the bell hosts the people in it sheilding them from the pressure.
you go to big catch and talk to the claws he will teach and give you a gem diving bell.
Use of and invention of deep water caisons for divers, the diving bell
brown to black
You answered it yourself- they have telephones so Bell crewmen are in constant contact with the Mother ship. A diving Bell is captive and cannot operate independently- unllike a submarine or Bathyscaphe. a Bathysphere is a spherical form of diving bell and has the same limitations. the modern bells - used in real ocean work have some form of telephone cable device so they are in constant contact with the surface vessel. Radio won"t work underwater, period.
You must first get to the mission with the diving bell and then you can go to diving locations
While there are earlier claimants, the encylopedia credits Sir Edmond Halley ( the astronomer Royal) of Comet Fame with the invention of the diving Bell- manned, in l7l7 ad.
Julian Schnabel
In 1535, Guglielmo de Lorena