To see if you have Coin-hive aboard give Zemana a try. https://www.zemana.com/download
.If you do not want to load the programme into your system there is a portable version available. Its free for 14 days and does remove any nasties it finds without you having to pay in that time span (some "free for 30 days etc" ones scan but ask for cash before removing). I've been a regular user of Malwarebytes and SuperAntispyware but trialling Zemana found extra nasties and removed them. In reviews it does zap coin-hive so if you suspect your infected give it a try. To prevent reinfection initiate a good adblocker.
As Shipspotting is reliant on ads, once the site has been cleared of the coin-hive intrusion, you can support the site by allowing its ads etc.
NOTE ... Zemana will do an initial scan of most likely areas of infection but not the whole drive . To search whole drive drag and drop your 'C' drive etc. into the box on its start-up page.