Emre E. Dluhos, pro se, appeals from a judgment of the United States District Court for the- Northern District of New York (David R. Homer, M.J.) dismissing his complaint for lack of in rem jurisdiction and denying his motion for leave to amend the complaint. After considering the parties’ arguments, we hold that the trial court properly dismissed Mr. Dluhos’s in rem admiralty claim for lack of jurisdiction. Specifically, Rule D of the Supplemental Rules for Certain Admiralty Claims requires that in order to maintain an in rem admiralty action against a vessel, the vessel generally must be arrested. Because Mr. Dluhos did not post the bond required by the trial court, the court did not arrest the vessel and therefore lacked jurisdiction over the vessel in rem.
We also hold that Mr. Dluhos should not be permitted to amend his complaint to attempt to bring his claim in diversity because any amendment would be futile. While the magistrate judge so concluded, we do not agree with the bases for his decision. In reaching our conclusion, we rely on two distinct grounds. First, it is a well-settled proposition that actions brought against vessels in rem sound exclusively in admiralty. Because Mr. Dluhos’s claim is at its core an in rem action against a vessel, it may not proceed in diversity. Second, even if the claim could permissibly be brought in diversity, the substantive law of admiralty must still apply to any diversity action brought by Mr. Dluhos, and admiralty law carries with it the legal fiction that a vessel may never be abandoned. Through the application of this fiction, because the vessel to which Mr. Dlu-hos seeks title would never have been abandoned as a matter of law, it would therefore be unavailable to him as the vessel’s “finder.”
Accordingly, we affirm both the dismissal of Mr. Dluhos’s complaint and the denial of his motion for leave to amend.
BACKGROUND
In 1896 the New York, a 158 foot long iron steam tugboat, was built by the Pennsylvania-Reading Railroad.
In October 1996, Mr. Dluhos sought- to effect the arrest of the vessel and to be appointed the vessel’s custodian during the pendency of the action. As a condition of arrest and appointment of Mr. Dluhos as custodian, the trial court required the posting of a $5,000 bond to cover the cost of insuring the vessel. Mr. Dluhos moved unsuccessfully to have the bond waived. In April 1997, because Mr. Dluhos had not posted the bond, the magistrate judge denied the motion to arrest the vessel. That June, the State of New York filed a motion to dismiss the complaint for lack of in rem jurisdiction because the res had not been arrested. Responding to the State’s motion, Mr. Dluhos sought to amend his complaint a third time to bring his claim in diversity. In a published opinion, the magistrate judge granted the state’s motion to dismiss and denied Mr. Dluhos’s third motion to amend. See Dluhos v. Floating and Abandoned Vessel, Known as “New York,”
Analyzing Mr. Dluhos’s most recent complaint, which alleged in rem admiralty jurisdiction only, the magistrate judge held that “before a court may exercise jurisdiction in an in rem admiralty action, the defendant vessel must be arrested within the court’s territorial jurisdiction.” Id. at 140. Because the vessel was never arrested, the magistrate judge determined that the court lacked jurisdiction over Mr. Dluhos’s claim for title to the vessel and therefore dismissed the complaint. Id. Turning to the motion to amend the complaint, the magistrate judge first found that the New York was not a “dead ship” and that it therefore remained a vessel for purposes of admiralty jurisdiction. Id. The magistrate went on to hold that Mr. Dluhos’s “assertion of diversity jurisdiction cannot succeed because his entire claim of title to the vessel is based on the law of finds, a concept grounded in admiralty.” Id. at 141. Accordingly the court denied the motion to amend the complaint because any amendment would be futile. Id.
Early in the litigation, pursuant to 28 U.S.C. § 636(c) and Rule 73 of the Federal Rules of Civil Procedure, the parties consented to have the magistrate judge conduct all further proceedings in the matter including any order of final judgment, waiving any appeal to a District Judge. Their appeal therefore lies with us, and for the reasons that follow, we affirm.
I. Motion To Dismiss
We must first determine whether the trial court properly granted New York State’s motion to dismiss for failure to arrest the res. The magistrate judge based his decision on the complaint supplemented by the undisputed fact that the vessel was not arrested. Under those circumstances, we review de novo a dismissal for lack of in rem jurisdiction. See United States v. One 1987 Mercedes Benz Roadster 560 SEC,
The magistrate judge was correct to look only to the allegations in Mr. Dluhos’s most recent complaint as “ ‘[i]t is well established that an amended complaint ordinarily supercedes the original, and renders it of no legal effect.’ ” Shields v. Citytrust Bancorp, Inc.,
A plain reading of the text of the rule makes clear that a warrant of arrest of the vessel must issue for the trial court to establish jurisdiction over the res. Id. (“[T]he process shall be by a warrant of arrest of the vessel-”) (emphasis added). In this way, the rule complies with historical admiralty practice, which requires a vessel’s arrest in order to maintain an in rem action against it. See Goodman v. 1973 26 Foot Trojan Vessel,
Before issuing a warrant for arrest of a vessel, a court may require the posting of a bond by a claimant. Fed.R.Civ.P. Supp. R. E(4)(e) (“These rules do not alter the provisions of Title 28, U.S.C., § 1921, as amended, relative to the expenses of seizing and keeping property attached or arrested and to the requirement of deposits to cover such expenses.”). Section 1921(a)(1)(E) explicitly provides that “The United States marshals or deputy marshals shall routinely collect, and a court may tax as costs, fees for ... [t]he keeping of attached property (including boats, vessels, or other property attached or libeled) [and] actual expenses incurred such as ... insurance....” 28 U.S.C. § 1921(a)(1)(E) (1994). Such fees are typically collected in advance in the form of a deposit. See 28 U.S.C. § 1921(a)(2) (1994). Under this statutory scheme, the fee required by the magistrate judge to cover the cost of insuring the vessel during the pendency of the litigation was entirely permissible, especially in light of the deteriorating condition of the vessel alleged by Mr. Dluhos. Because Mr. Dluhos did not post the bond reasonably required by the trial court, the court properly declined to arrest the vessel and therefore Mr. Dluhos could not maintain an in rem action against it.
In addition, we note that Supplemental Admiralty Rule E(4)(b) does not excuse Rule D’s arrest requirement; rather it merely informs its application. Rule E(4)(b) provides that:
*69 If the character or situation of the property is such that the taking of actual possession is impracticable, the marshal or other person executing the process shall affix a copy thereof to the property in a conspicuous place and leave a copy of the complaint and process with the person having possession or the person’s agent.
Fed.R.Civ.P. Supp. R. E(4)(b) (emphasis added). The rule makes clear that impracticability excuses only the “taking of actual possession” of the res, not arrest itself. That is, in order to maintain an in rem action against a res where taking of actual possession is impracticable, a warrant of arrest must still issue from the court, but the possession of the res after the arrest may be constructive as opposed to actual. Cf. United States v. James Daniel Good Real Property,
Likewise, although at least two of our sister Circuits have indicated that the arrest requirement may be excused through an affirmative waiver by all parties, see, e.g., United States v. Republic Marine, Inc., 829 F.2d 1399, 1402 (7th Cir.1987); Cactus Pipe & Supply Co., Inc. v. M/V MONTMARTRE,
Accordingly no exception requires us to tack from the course charted by Rule D’s arrest requirement, and accordingly we affirm the magistrate judge’s dismissal of Mr. Dluhos’s action for lack of in rem jurisdiction.
II. Motion To Amend
Mr. Dluhos also appeals the magistrate judge’s denial of his motion to amend the complaint to bring his claim in diversity. On that issue, the trial court correctly determined that any amendment to Mr. Dluhos’s complaint would be futile because his cause of action is exclusive to admiralty and therefore not cognizable in diversity. As we discuss- in greater detail below, however, the precise analysis the trial court used to reach that result was not sound.
Generally leave to amend should be “freely given,” Fed.R.Civ.P. 15(a), and a pro se litigant in particular “should be afforded every reasonable opportunity to demonstrate that he has a valid claim.” Satchell v. Dilworth,
In the circumstance of this case, the untimeliness of Mr. Dluhos’s motion alone may not justify denying his motion to amend.
The magistrate judge’s other reason for denying the motion was his finding that Mr. Dluhos’s action “cannot succeed because his entire claim of title to the vessel is based on the law of finds, a concept grounded in admiralty.” Dluhos,
The magistrate judge was, however, not far from the mark. Mr. Dluhos’s motion to amend is futile, but for two independent reasons not relied on by the trial court. First, though not dictated by the substantive law of finds, the nature of the action brought by Mr. Dluhos is exclusive to admiralty jurisdiction and therefore may not be brought in diversity. Alternatively, even if Mr. Dluhos’s claim were cognizable in diversity, in this case, the substantive admiralty law that would apply carries with it a legal fiction that a vessel may not be abandoned. Because a successful claim under the law of finds requires that the found property be abandoned, the fiction of nonabandonment dictates that Mr. Dluhos’s claim must fail.
A. Exclusive Admiralty Jurisdiction
Although the Constitution provides that the reach of federal courts “shall extend ... to all Cases of admiralty and maritime jurisdiction,” U.S. Const, art. Ill, § 2, cl. 1, federal courts’ jurisdiction over such claims is not exclusive. See American Dredging Co. v. Miller,
Nonetheless, certain classes of cases are cognizable only in admiralty, and therefore a claim in diversity will not lie in those circumstances. In this respect, “[a]n action against [a] vessel in rem would fall within the exclusive admiralty jurisdiction and could not be brought under diversity jurisdiction.” T.N.T. Marine Serv. Inc. v. Weaver Shipyards & Dry Docks, Inc.,
The New York plainly is a vessel for purposes of admiralty jurisdiction. In his opinion, the magistrate judge applied the “dead ship doctrine” to determine whether the New York “no longer has status as a vessel” and therefore is no longer subject to admiralty jurisdiction. Dluhos,
The issue of whether Mr. Dluhos’s proposed diversity action would be barred because it is in effect an in rem action is more difficult. We begin by noting that Mr. Dlu-hos has consistently characterized his claim as one to establish title as against the rest of the world, see, e.g., Brief for Plaintiff-Appellant Emre E. Dluhos at 7; indeed, he has sought on at least one occasion to have the State removed from the action as a party. We therefore conclude for purposes of this appeal that Mr. Dluhos does not seek to bring an ordinary in personam action under 28 U.S.C. § 1332 against a series of individual defendants, including New York State or other current or potential claimants he is able to identify and serve.
Section 1655 provides in pertinent part that: “In an action in a district court ... to remove any ... cloud upon the title to ... personal property within the district ... [i]f an absent defendant does not appear or plead within the time allowed, the court may proceed as if the absent defendant had been served with process within the State, but any adjudication shall ... affect only the property which is the subject of the action.”
Whether brought in rem or quasi-m rem, § 1655 actions bear the hallmarks of a typical in rem action. For example, for an action under § 1655 to go forward, the res must be in the constructive possession of the court (although actual possession is not necessary). See First Charter Land Corp.,
More importantly, however a § 1655 action is characterized, it would be futile for Mr. Dluhos to bring such an action. To the extent that Mr. Dluhos’s potential § 1655 action is a quasi-m rem action, it would not accomplish his objectives. The judgment in a quasi-w rem action affects only the defendant’s or defendants’ claim to the res, rather than the claims of “all the world.” 16 James Wm. Moore et al., Moore’s Federal Practice ¶ 108.70[1] (3d ed.1998) (citing Restatement (Second) of Judgments § 6 emt. a (1982)). Mr. Dluhos, as we explain above, has always sought title as against the entire world.
In order to establish title as against the whole world, Mr. Dluhos’s action under § 1655 would necessarily have to be a true in rem action. This is so because he seeks to adjudicate his right to the New York as against all possible owners, not simply against one given defendant. See id.; see also The Moses Taylor,
B. The Substantive Law of Admiralty
Even if Mr. Dluhos could permissibly bring his claim in diversity under § 1655, his complaint would still have been properly denied as futile because Mr. Dluhos’s claim also would ultimately fail under the substantive law of admiralty.
In cases where admiralty jurisdiction is not exclusive and a claim may be brought either in admiralty or in diversity, the plaintiff may choose the jurisdictional grounds on which to bring the action. See Fed.R.Civ.P. 9(h). This decision carries only limited consequences, however, because any differences occasioned by the difference in forum are limited to procedure, and indeed procedures may differ depending on the basis of subject matter jurisdiction only when they do not constitute “ ‘characteristic feature^]’ of admiralty or a doctrine whose uniform application is necessary to maintain the ‘proper harmony’ of maritime law.”
In admiralty cases, courts have traditionally applied a legal fiction to ships, under which an owner or the owner’s successor retains title to a ship no matter how long it has been abandoned. See, e.g., Columbus-America Discovery Group,
Therefore even if Mr. Dluhos’s claim were cognizable in diversity, because the New York could not have been abandoned as a matter of law, Mr. Dluhos’s claim under the • law of finds must fail. For that reason as well, his motion to amend was properly denied as futile.
CONCLUSION
For the foregoing reasons, we affirm the judgment entered in the court below, dismissing Mr. Dluhos’s Second Amended Complaint and denying his motion to amend.
Notes
.The brief recitation of facts that follows is un-controverted and derives largely from the pleadings. Additional background information on the vessel may be found in Andrew Jacobs, Drama Off the High Seas; Lawsuit Rages Over a Decaying, and Historic, Tugboat, N.Y. Times, May 21, 1998, at Bl.
. Since its launching, the tug has borne many names, including Tankmaster # 1, Beth Tankship # 2, and now New York.
. The New York is apparently an exceptional example of a late nineteenth century seagoing tug. With her original boilers, engine, and hull- — albeit in poor condition — she is believed to be the only vessel of her class in existence. At the time
Evidently, since the magistrate judge's decision, the New York State Canal Corporation (the branch of the New York State Thruway Authority charged with maintaining the Erie Canal) assisted a boat salvager from Kingston, NY, in removing the New York from its location near Waterford. Apparently the salvager now has possession of the vessel in Kingston.
. After granting the first motion to amend the complaint, the magistrate judge ordered that Mr. Dluhos publish notice of his action. In response to his published notice, the National Maritime Historical Society came forward, asserting that it was the sole legal owner of the vessel. The Society has since assigned its claim to the Friends of the Catawissa, a nonprofit group located in New York City.
. Because Mr. Dluhos claims that the New York was abandoned and because he has evidently initiated this action within six months of his "finding" the vessel, Article 7-B of New York’s Personal ProperLy Law would not apply to any action he brought under state law. See N.Y. Pers. Prop. Law § 251(3) (McKinney 1992) ("Abandoned property ... shall be presumed to be lost property and such presumption shall be conclusive unless it is established in an action or proceeding commenced within six months after the date of the finding that the property is not lost property.”) (emphasis added). Therefore, New York's state law would not require Mr. Dluhos to meet the Article's requirements — described in §§ 252-58 — for claiming lost property.
. Even if he were attempting to do so, any such amendment to his complaint would still be futile for the reasons described below in Section II.B.
. As explained below, this allegation raises problems of its own for Mr. Dluhos's claim under the substantive law of admiralty.
.Because we determine below that the § 1655 action Mr. Dluhos seeks to bring would necessarily be an in rem action cognizable only in admiralty, we need not determine whether Mr. Dluhos has complied with the procedural requirements of § 1655, such as attempted service.
. In this respect, we note without deciding that admiralty’s arrest requirement may qualify as a characteristic feature of admiralty law and may therefore apply even if Mr. Dluhos's claim were cognizable in diversity. Cf. Aurora Maritime,
. The central difference between salvage and finds law is that under salvage law, "the original owners still retain their ownership interests in such property, although the salvors are entitled to a very liberal salvage award ...., and if no owner should come forward to claim the property, the salvor is normally awarded its total value.” Columbus-America Discovery Group,
. It is not clear whether the trial court made a specific finding that the vessel had been abandoned in any technical sense. See Dluhos,
