What kind of ships have typically the longest lifespan?
Ocean tankers
Ocean passenger ships
Aircraft carriers
Great Lakes freighters
Since the freshwater lakes are less corrosive to ship than the salt water of the oceans, many of the Lakers remain in service for long periods and the fleet has a much higher average age than the ocean-going fleet. The St. Mary's Challenger, built in 1906, is currently the oldest boat on active duty on the Lakes.
reach: rather globallakesnavyshipswater
Answers by country
Ocean tankers
Ocean passenger ships
Aircraft carriers
Great Lakes freighters
answers
the Netherlands
22
Canada
22
France
10
Republic of Ireland
19
Italy
11
Australia
29
Greece
26
Singapore
12
Poland
11522
the United Kingdom
125
Austria
65
New Zealand
10
the United States
258
Germany
489
India
123
Pakistan
22
Switzerland
35
Nigeria
13
the Philippines
15