(A) Except as otherwise provided by the Admiralty Supplemental Rules, parties
may sue and parties (including a vessel or other res) may be sued either jointly, severally
or alternatively in one suit, and persons having separate causes of action may join in one
suit if the cause of action involve substantially the same questions and arise out of the same
transactions.
(B) Persons who, under the preceding paragraph of this rule, might have joined
as co-plaintiffs, and, in suits for wages, any other seamen claiming wages for the same
voyage, not made parties in the original complaint, may, upon motion, be joined to
prosecute as co-plaintiffs upon such terms as the court may deem reasonable.
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