An oblong crystal found in the wreck of a 16th-century English warship is a sunstone, a near-mythical navigational aid said to have been used by Viking mariners, researchers said on Wednesday.
Seafarers are being encouraged to take part in a unique global study, using a mobile phone app to record the effects of climate change.
The probability of being killed at work is 25 times higher for a coastal fisherman than for an offshore worker, according to a study from the UiS. Seafarers also run a high risk of accidents.
For centuries, seafarers were plagued by wood-eating gribble that destroyed their ships, and these creatures continue to wreak damage on wooden piers and docks in coastal communities.