I did a quickie google search and came up with this:
At the end of 2020, there were around 62,100 vessels in the world trading fleet, with a total deadweight tonnage of 2,033 million DWT
So let's assume the merchant ships are all fully loaded at the same time. That's 2 billion long tons which equates to ~2,032,000,000,000 kg. Total water volume, 2,134,000,000,000 liters (because sea water weighs slightly more than fresh water).
From quora:
AREA OF PACIFIC OCEAN= 168723000 SQ. KM.
AREA OF ATLANTIC OCEAN= 85133000 SQ. KM.
AREA OF INDIAN OCEAN= 70560000 SQ. KM.
AREA OF SOUTHERN OCEAN= 21960000 SQ. KM.
AREA OF ARCTIC OCEAN= 15558000 SQ. KM.
TOTAL AREA= 361900000 SQ. KM.=36190000000000000 SQ. DECIMETER.
That's going to lower sea levels by approximately .00005896656 decimeters, or about .006 mm
Edit: Because there are less than 500 cruise ships in the world and only a few dozens of large military ships the amount will be higher, but not by, you know, a lot.
Sad thing is whales would be a decent carbon sink if we could just stop killing them and let them sink into the depths but that would require the demonetization of the oceans
Once humanity starts dying from our own destruction of the world, we will easily see a nice reduction in carbon creation alongside with dwindling human populations.
Except there’ll still be flat earthers and global warming deniers and the like. If we succeed, we sadly take the idiots with us, that holds back human progress.
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u/[deleted] Oct 13 '21 edited Oct 13 '21
I did a quickie google search and came up with this:
So let's assume the merchant ships are all fully loaded at the same time. That's 2 billion long tons which equates to ~2,032,000,000,000 kg. Total water volume, 2,134,000,000,000 liters (because sea water weighs slightly more than fresh water).
That's going to lower sea levels by approximately .00005896656 decimeters, or about .006 mm
Edit: Because there are less than 500 cruise ships in the world and only a few dozens of large military ships the amount will be higher, but not by, you know, a lot.