Sentences with phrase «shallow waters during»

On this Kauai beach near Princeville Resort, you can snorkel the longest and widest reef in the Hawaiian islands and swim in safe, shallow water during summer.

Not exact matches

Tankers exiting Vancouver harbor must transit through the shallow Second Narrows channel during «high slack water» — a short tidal window of about 20 minutes that provides loaded tankers with less than two metres of under - keel clearance.

Williams Pollock, which worked on the study with Water Technology Inc., is proposing that the slope in the main pool, which begins at a depth of 2 1/2 feet, be eliminated because it is too shallow for diving during competitive swim meets.

Float a bath toy in a shallow pan of water to up the sensory experience of looking at a toy during belly - down playtime.

Earlier this year an analysis of mitochondrial DNA conducted by researchers in the United States, Japan, and Taiwan estimated that the first anglerfish appeared about 160 million years ago, during the Jurassic Period, and quickly diversified as they spread into habitats ranging from shallow waters to the continental shelves to the harsh deeps.

In 1991, the IMO adopted guidelines which recommend that ships should avoid taking on ballast in shallow areas and during toxic blooms of marine algae; keep accurate records of where and when ballast is loaded; exchange ballast water at sea, where toxic organisms are rare; and discharge sediments into approved areas at the port of destination («End of the line for deadly stowaways», New Scientist, 24 October 1992).

This raises concern that toxic chemicals used during the drilling could seep into shallow drinking water sources.

Through phylogenetic analysis, the research team discovered that modern deep - sea mussels are the descendants of shallow - water mussels, and their ancestors migrated to the deep sea approximately 110 million years ago, providing evidence to support a hypothesis that their ancestors survived through an extinction event during the global anoxia period associated with the Palaeocene - Eocene Thermal Maximum which occurred around 57 million years ago.

«The shallow underwater tests performed during that time did create a highly radioactive plume with some fission products trapped in the water, although that material disperses and gets diluted fairly quickly,» Lyman says.

Some of the shallow - water seeps are likely to be in now - submerged areas that were methane - producing wetlands during the most recent ice age, when sea levels were more than 100 metres lower than they are today.

It is fossiliferous, extensively bioturbated and interpreted to have been deposited in a productive, shallow - water, inner shelf environment during a transgression [11].

The researchers found that over a 15 - day period, the water temperatures were most extreme when the low tide period drifted to align with maximum sun heat during noon, and these conditions caused the warming of the shallow water on the reefs.

«The circadian rhythm guides these animals through a daily migration, to deep waters during the day to hide from predators and shallow waters at night to feed.

This type of algae thrives during warm and sunny days in shallow, nutrient rich bodies of water.

All the basics of scuba diving through knowledge development, a set of scuba skills in confined / shallow open water that you'll use again during open water dives, and an appreciation for the underwater world that will keep you coming back for more bottom time every chance you get!

No prior experience with scuba diving is necessary.While not an actual scuba certification, during the Discover Scuba Diving experience you'll learn how to use scuba equipment in shallow water and get a quick and easy introduction to what it takes to explore the underwater world.

During summer when the surf is low, you can refresh yourself in the shallow waters of Naue.

During the months of October and November, the grouper move towards the shallow waters inside the reef and swarm in the thousands on the lee side of the Cayes.

Here your instructor will put into practice the techniques you've learned during the academics program.The confined water sessions are completed in the shallow sandy bays of one of our beautiful cayes.

With balmy water temperatures during the summer months, Praia das Milicias is ideal for paddling about in the shallows and swimming.

During the Discover Scuba Diving experience you'll learn how to use scuba equipment in shallow water and get a quick and easy introduction to what it takes to explore the underwater world.

The eastern North Pacific stock of gray whales prefers shallow, coastal waters and feeds over oceanic continental shelves around the northern Bering and southern Chukchi seas between Alaska and Russia during the summer.

At reef breaks and beach breaks, surfers have been seriously injured and even killed because of a violent collision with the sea bed, the water above which can sometimes be very shallow, especially at beach breaks or reef breaks during low tide.

7 During the winter, the Marine Bio Conservation Society states that the gray whales inhabit shallow coastal waters of the eastern and western North Pacific often sighted along the North American Pacific Coast between the arctic and the equatorial lagoons of Baja California, Mexico.

It is an extremely popular activity and while it is not an actual scuba certification, during the Discover Scuba Diving experience you'll learn first a bit of diving theory followed by the use of scuba equipment in shallow water, after which you will be able to get an easy introduction to exploring the underwater world.

Many tours have shallow water snorkeling, sandwiches, and something cold to drink during your adventure.

Small children and beginner snorkelers are advised to only snorkel on the rocky area of shallows along the cove, no farther than 15 - 20 feet offshore where the water is calmest during summer months.

During these months, the water temperature around the islands of Nusa Penida, Nusa Lembongan and Nusa Ceningan drop — creating the perfect environment for the Mola Mola (Bali Sunfish) to come up to shallower waters — allowing divers to view these majestic animals.

While not an actual scuba certification, during the Discover Scuba Diving experience you will learn how to use scuba equipment in shallow water and get a quick and easy introduction to what it takes to explore the underwater world.

The reason we don't want our customers to surf during low or high tide is simple because we want to avoid the water condition which is either too shallow or too deep.

During the Discover Scuba Diving experience you'll learn how to use scuba equipment in shallow water, get a comfortable and easy introduction to a few Scuba skills before diving in open water, all under the watchful eye of a PADI Instructor.

CHINA BEACH (East Beach) If you are looking for one of the safest beaches for families, China Beach offers shallow waters for kids to play in and sometimes has lifeguards on duty during the summer.

It's not unusual for gray whales to come close to shore in shallow waters, especially during their northbound migration.

Sea ice is critical for polar marine ecosystems in at least two important ways: (1) it provides a habitat for photosynthetic algae and nursery ground for invertebrates and fish during times when the water column does not support phytoplankton growth; and (2) as the ice melts, releasing organisms into the surface water [3], a shallow mixed layer forms which fosters large ice - edge blooms important to the overall productivity of polar seas.

''... worked with two sediment cores they extracted from the seabed of the eastern Norwegian Sea, developing a 1000 - year proxy temperature record «based on measurements of δ18O in Neogloboquadrina pachyderma, a planktonic foraminifer that calcifies at relatively shallow depths within the Atlantic waters of the eastern Norwegian Sea during late summer,» which they compared with the temporal histories of various proxies of concomitant solar activity... This work revealed, as the seven scientists describe it, that «the lowest isotope values (highest temperatures) of the last millennium are seen ~ 1100 - 1300 A.D., during the Medieval Climate Anomaly, and again after ~ 1950 A.D.» In between these two warm intervals, of course, were the colder temperatures of the Little Ice Age, when oscillatory thermal minima occurred at the times of the Dalton, Maunder, Sporer and Wolf solar minima, such that the δ18O proxy record of near - surface water temperature was found to be «robustly and near - synchronously correlated with various proxies of solar variability spanning the last millennium,» with decade - to century - scale temperature variability of 1 to 2 °C magnitude.»

Until recently, ocean current data collected during a typhoon have been gathered from shallow waters along the coastline.

«shallow coral were increasingly vulnerable to deadly desiccation during more extreme sea level drops when warm waters slosh toward the Americas during an El Niño.»

In fact the shortwave energy absorbed during the tropical summer at depth remains there until the winter when the humidity falls enough so that evaporative cooling sets up strong enough vertical convection to overcome the shallow diurnal reversals in the topmost one to three meters and dredge those deeper waters up to surface where some more rapid cooling can take place.

In addition to being sweatproof and waterproof — they can be submerged in shallow water for up to 30 minutes — the Elite Sport headphones also feature a built - in heart rate monitor, helping listeners keep track of their vitals during strenuous workouts.