All the Trimmings: Tips to Improve Your Efficiency in Water with Good Trim

Scuba diver
With good trim, divers are more efficient and can stay longer and safer underwater.

Trim is a misunderstood, and often poorly rectified, scuba skill. In our scuba journey, trim is something that we may or may not encounter or discuss, unless we get into technical diving or more advanced recreational diving. Francesco Cameli offers insight and advice in how to improve your trim and increase your efficiency in the water.

The mahi-mahi were tagged before being released back into the ocean.
The mahi-mahi were tagged before being released back into the ocean.

Fish behaviour affected by exposure to crude oil

The 3.19 million barrels of crude oil that spilled into the Gulf of Mexico during the Deepwater Horizon in 2010 had a devastating impact to the natural environment, as well as the people and animals in the vicinity.

A study on the mahi-mahi in the nearby waters revisits the incident by studying how fish in the wild are being affected from the exposure to crude oil.

Multibeam sonar image of the SS Mesaba lying on the sea bed in the Irish Sea.

The ship that tried to warn the Titanic has been found

The British merchant steamship SS Mesaba sent a warning radio message to the Titanic on April 15, 1912 while crossing the Atlantic. The message was received by the Titanic – which was advertised as unsinkable – but did not reach the main control centre of the vessel.

Later that night, the supposedly unsinkable Titanic hit an iceberg and sank on her maiden voyage, taking 1,500 lives and becoming the world’s most infamous shipwreck.

A tagged fin whale
A tagged fin whale

New satellite tag tracks long-term whale behaviour

Keeping an eye on whale behaviour is not easy, considering the fact that they travel vast distances and spend the majority of their time beneath the ocean surface.

To counter this, researchers at Oregon State University {OSU) have developed a new satellite tag that can track the whales' movements, even during dives.

Known as RDW, this new technology incorporates pressure and accelerometer sensors, thus giving the researchers the opportunity to monitor the whales’ movements underwater for several months.