Submarine Above a Coral Reef
An underwater exploration vessel glides through deep ocean waters just above an active marine seabed.
A4 format (landscape), black outlines on a white background · for home and classroom use
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Deep Sea Submarine Navigating Ocean Depths
A large submarine moves gracefully above a sandy ocean floor. Down on the seabed rest an old metal anchor and a sunken wooden chest, positioned near a colorful coral reef and a natural rocky arch formation.
How Submarines Operate Under Water
Submarines use special internal tanks called ballast tanks that fill with sea water to submerge or fill with compressed air to surface. Hydroplanes and rudders help the vessel steer through deep ocean currents while sonar equipment bounces sound waves off underwater rocks to map terrain in complete darkness. Submersibles allow scientists to explore deep reefs that human divers cannot reach safely.
Natural Colors of the Underwater Environment
- Submarine exterior: yellow, dark gray, or black
- Coral reef formations: vibrant pink, orange, or purple
- Ocean seabed sand: pale beige or light tan
- Sunken treasure chest: dark mahogany brown with brass gold bands
- Submerged rocky arch: dark gray or moss green