Two very large and exposed LNG fuel tanks aboard the Chinese-built and operated Very Large Crude Carrier (VLCC) Yuan Rui Yang (IMO: 9843326)
Covert shores points out the potential dangers associated with alternative fuels being used on merchant ships.
“Increasingly we are seeing new fuel types being used by merchant ships. This trend is driven by environmental regulations (regardless of their current status at the IMO – International Maritime Organization), which pushes ship operators toward equipping merchant ships to operate on alternative fuels. The fuels of interest ate liquefied natural gas (LNG), liquefied petroleum gas (LPG), liquid ammonia (NH₃), and methanal (MeOH).”
This is obviously a Port Security issue, but really may become an issue in SAR cases or Port, Waterways, and Coastal Security missions.
It is one more reason we need to be able to counter drones, and we need weapons that target with precision and minimum collateral damage.
The article makes much of the fact that frequently these fuel tanks are exposed, but perhaps internal tanks may be equally dangerous and less obvious.
Chuck Hill's CG Blog 
From day one seeing these cylindrical fuel tanks topside . . . in a DRONE ENVIRONMENT ? . . what could go wrong?
I am not an expert on firearms, but seems to me that a plain old 50 cal sniper rifle with some Armor Piercing rounds could be an issue also, and seems to me they will reach at least a mile
OSINT: Indications Russia Will Re-Route LNG Exports Via Arctic To Avoid Ukrainan Threat https://www.hisutton.com/Russian-LNG-Exports_head-To-Arctic.html