5. Vessels, Net


			Accumulated
	Cost		depreciation		Net book Value
Balance, April 1, 2019	$	1,732,993,810	$	(254,473,496)	$	1,478,520,314
Other additions		7,362,978		—		7,362,978
Depreciation		—		(32,406,423)		(32,406,423)
Balance, September 30, 2019	$	1,740,356,788	$	(286,879,919)	$	1,453,476,869

Additions to vessels, net mainly consisted of installments on the purchase of scrubbers for ten of our VLGCs during the six months ended September 30, 2019. Our vessels, with a total carrying value of $1,453.5 million and $1,478.5 million as of September 30, 2019 and March 31, 2019, respectively, are first‑priority mortgaged as collateral for our long-term debt (refer to Note 6 below). No impairment loss was recorded for the periods presented.