I would also like to point out that it also affects the NH add-on . One thing I've noticed so far:
Bugsier 2 now has radar arrays
Edit:
From ShipSim website:
[ UPDATE 1.4.1 ]
[ Features ]
Improved Azimuth controls
Support for Ship Simulator 2008 New Horizons
Towing performance improved
Sorted ships alphabetically
Improved ocean bumpmaps
AI ships stop for the playership
Pushboat connection
Improved dynamics
Minor multiplayer interface improvements
[ Bug fixes ]
WakeEffects improved performance
WakeEffects loading fix
FloatingBox better update-rate, better behaviour static ships
Minor language file fixes
Mission "Leaving the new terminal" fixed
Bow splashes 'huge splash' fixed
Bow splashes effect jitter in large environments fixed