Brandish a gunâIn England, bank robbers who threatened employees and customers with a gun stole, on average, about $16,000 more than robbers who were unarmed. Of course, showing off a gun raises the risks as wellâarmed robbery almost always comes with a minimum jail sentence and makes things more dangerous.
Dive Support Vessels.  Dive support vessels or diving support vessels are ships used in professional diving projects as a floating base. Diving systems are considered can compete for valuable deck space in oil and gas production platforms. It is far more practical to use mobile floating dive support vessels.
A pressure vessel is a closed tank that is certified by the manufacturer (at the least) to hold up to a maximum pressure. the tank is container like pot etc with or without a lid where we can store any liquid and from that we can draw any quantity. But a pressure vessel is not like a tank.