They will come in due time… 
Good evening Capt Ombugge.
Trust You know Ms Lena and her “shipping podcast”. I follow Her on google podcast and listen to her output. Some are interesting some not . Her last had my head spining about the MASS issue. Here is the link to her podcast :
Spotify
last episode about sails on cargo ships. Can You may be explain how the hell the interviewed CEO has converted 6 metric tonnes of hfo into 19 metric tonnes of CO2 as it stands in contrast with certain laws.
n physics and chemistry, the law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system’s mass cannot change, so the quantity can neither be added nor be removed. Therefore, the quantity of mass is conserved over time.
Above i understand but the Guy talking to Her I do not . Can You help as You are the “Green” buff .
Cheers
Good evening Capt. Confessor.
Sorry, I don’t know Ms Lena, or her shipping podcast, nor am I “Green” in any respect. (I’m not from Mars, or a “greenhorn”)
How you can get more mass by converting a liquid into a gas beats me as well.
John Cooper, CEO of BAR Technologies is on LinkedIn, maybe you can ask him for an explanation?
PS> Were you home during the recent earthquake?:
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Burning one kg of HFO results in 3.1 kg of CO2. The extra weight is from the oxygen.
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Ahh!! deceptively simple:
Source: https://climate.mit.edu/ask-mit/how-can-burning-one-ton-fuel-create-more-one-ton-co2
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THX!!! . In trying to figure out basis above encyclopedic description , I have completely ignored , the fact that in this kind of mass convertion to energy + sum of all residues in the proces of burning , O2 is and must be present and be a source of extra weight . That simple. 
And dbeierl . Thank You too.
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Thx for asking.
Nope. I have been stayng at Gdynia for a couple of weeks to attend to some personal/legal matters and it looks I will spend Xmas here and may be till Feb 2024 to settle/resolve all matters. Tragic news indeed but I hear all my friends and acquaintances are fine there, except some property damage . Luckily for this region earthquakes are less frequent then typhoones in the north. And here is damn cold and unfriendly and too close to Putin. 
it’s not a closed system.
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THX.
That is exactly right and I do not know how I missed the word “closed” in a/m rule. But it is all right know and simple as pie , even banal.
As One carbon dioxide molecule has Ihe relative molecular weight of 12 (carbon) + 2 X 16 ( two oxygen) or 44.
If 100 %of the carbon in 1kg of oil reacted you would actually get 3.14kg CO2, some of the weight from the original carbon atoms in the oil, some from atmospheric oxygen. So I think my question has been fully answered by Forum participants. Thank You.
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Why sails and not rotors?
Bridge visibility?
Radar/Arpa blind sectors?
With bridge situated forward it may be OK but then loking at port ops and gantries positioned between those huge structures, the risk of damage seems to me very high .How about mooring systems ? Vsl may surge fore/aft , when other vsls pass in the basin/channel . Lines even whith auto tension off are capable of stretching a lot . TEU intake is reduced , hence earnings too. And forget abt berthing with gantries down what happens frequently and is the reason of tension btw master/pilot. I am a bit sceptical abt cont vsl with such sollutions. But i may be wrong of course and too conservative.
Hapag-Lloyd studying 4,500TEU wind-powered box ship concept (seatrade-maritime.com)
Back to the real thing.
My first ship at sea. (Febr.-April, 1959):
For your pleasure, I give you the oldest full rigged ship in the world still sailing: the stunning “Sorlandet”.
Source: Sailing lover
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Under the deal, announced last October, LDA is to build, own and operate three modern, low-emission sips, supported by wind-assisted propulsion.
The ships transport aircraft subassemblies between production facilities in Europe and the US.
Ever wondered about what the different type of sail ships rigging were called?:
Now you know.
Source: https://theteerose.com/sailing
They missed a yawl.
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And a sloop
Brigantine is also known and in the past was commonly know as a hermaphrodite brig.
@ombugge I see a lot of these new cargo ships with sail concepts that look like they have one large sail. This is a problem because the wind angle changes the higher up you go. (water affects the wind via friction and the angle changes). That’s why old square riggers would have their sails set at different angles sometimes significantly thus looking like they spiraled up the mast so to speak.
Are any of the new designs considering this or thinking about the changing wind angle based on heigh about sea level?
Brigantines had square topsails above the gaffed mainsail.
Those with no square sails at all on the mainmast were hermaphrodite brigs.