Sniff test
Sniff test
SNIFF test
sniff test
sniff test
Sniff test
sniff test
Sniff test
A chase boat could be a: 1.) A boat used as a safety while a stunt is performed. 2.) A boat used to draw attention away from another vessel 3.) A boat used as a filming platform for another boat. 4.) A boat that gives chase.
The song "Six Months in a Leaky Boat" is performed by Split Enz.
A fishing boat using sonar to locate fish is employing reflection. The technique that uses sound propagation to detect objects under the water.
If you mean a U-boat (as in Underwater boat or submarine) the answer is YES. A blockade is a visible, open challenge, whereas a U-boat is a lurking threat, difficult to detect and carries deadly weapons. Additionally, a blockade implies several heavy warship prepared to 'slug it out' but, a single hidden U-boat can pose the same threat and do just about the same damage.
They're not - they are pressurized upon submergence to maintain a positive pressure in the boat to detect any hull breaches. Any seal leak or breach, no matter how small, will immediately register on the boat's pressure board.