The hydrogen fuel tank also functions as {TAIL ~ the vessels} ballast having {HEAD ~ adjustable draft} depending upon its fullness 
The hydrogen fuel tank also functions as { TAIL ~ the vessels } ballast having { HEAD ~ adjustable draft } depending upon its fullness
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH