This suit — the result of a contract dispute between ship purchaser J.A.R., Inc. (“J.A.R.”) and shipbuilder Network Marine, Inc. (“Network”) — is an action brought by J.A.R. to obtain title to or possession of The Lady Lucille, and for security pending arbitration under Title 9 of the United States Code. The United States District Court for the Eastern District of Louisiana granted J.A.R.’s motion for summary judgment and entered judgment vesting title to The Lady Lucille in J.A.R., and Network now appeals that judgment. Finding an absence of both admiralty and diversity jurisdiction, we reverse and render judgment dismissing J.A.R.’s complaint for lack of subject matter jurisdiction.
I
A
In August 1990, Network and its president, Wilton P. Dugas, entered into a contract with J.A.R. for the former to construct an aluminum hull vessel for use as a dinner cruise or excursion boat and deliver that vessel to Network’s Louisiana shipyard. J.A.R. agreed to supply much of the vessel’s equipment, including engines, gears, generators, air conditioners, electronic equipment, and furnishings. Network agreed to build the vessel according to contract plans and specifications, and to install the equipment furnished by J.A.R. The contract provided for the application of Louisiana law and for arbitration of contract disputes according to the rules of the American Arbitration Association.
The base contract price was $267,000, with a twenty percent downpayment and two twenty-percent progress payments. The remaining forty percent, after adjustment for change orders, was due upon issuance of a Temporary Certificate of Inspection by the United States Coast Guard and was to be paid prior to delivery of the vessel. J.A.R. paid the first three installments as scheduled — allegedly leaving a $107,000 balance on the contract price — and supplied approximately $70,000 worth of equipment, which was installed by Net *98 work. As the vessel (The Lady Lucille) neared completion, J.A.R. determined that The Lady Lucille did not meet the contract specifications. According to J.A.R.’s marine surveyor’s report, “the basic vessel [was] sound, and probably suitable for some type of commercial use, although ... not suited for dinner cruise service in an upscale environment.” J.A.R. refused to accept delivery when, after issuance of the Coast Guard Temporary Certificate of Inspection, Network tendered The Lady Lucille. The contract dispute is presently in arbitration.
B
Alleging both admiralty and diversity jurisdiction, J.A.R. filed this suit — an action to obtain title to or possession of The Lady Lucille — in the United States District Court for the Eastern District of Louisiana. J.A.R. alleges in its complaint that the suit is an action for security pending arbitration under Title 9 of the United States Code.
Seeking to execute on a state court judgment for materials used in construction of the vessel, Network’s creditor, Industrial Metals of the South, Inc. (“Industrial Metals”), moved to intervene as a plaintiff-lien claimant against The Lady Lucille, and that motion was granted. Since Industrial Metals is a Louisiana corporation, as is defendant Network, Industrial Metals’ intervention destroyed diversity jurisdiction between the parties, thereby leaving admiralty as the only basis for jurisdiction. Network then moved the district court to dismiss this suit for lack of subject matter jurisdiction, and the court, ruling that admiralty jurisdiction is appropriate, denied that motion.
J.A.R. and Network then filed cross-motions for summary judgment, each party seeking to have title to The Lady Lucille declared to rest exclusively in its own name. On April 10, 1991, the district court granted J.A.R.’s motion for summary judgment and entered judgment vesting title to The Lady Lucille in J.A.R. Only Network appeals.
II
To invoke admiralty jurisdiction in a contract dispute, the underlying contract must be a maritime contract.
1
A maritime contract is “[a] contract relating to a ship in its use as such, or to commerce or navigation on navigable waters, or to transportation by sea or to maritime employment.]”
Thurmond v. Delta Well Surveyors,
Although the district court found admiralty jurisdiction, this court must examine the basis of subject matter jurisdiction sua sponte when it appears at all questionable.
See Giannakos v. M/V Bravo
*99
Trader,
The district court distinguished this case from The Wanda on the grounds that all of “the problems relating to interpretation of the contract regarding price, breach, and extras have been expressly referred to arbitration,” 3 and characterized what remains as purely a petitory action for title. However, The Wanda did involve a “pos-sessory or petitory” action, which was brought in admiralty by a shipbuilder to try title to a yacht when the purchaser failed to make a large contract payment. This court declined jurisdiction in The Wanda, stating that:
A maritime contract is one which concerns transportation by sea, relates to navigable waters and concerns maritime employment.... [Wjhether this suit is viewed as one to enforce a security interest or mortgage on a vessel, a suit to try or quiet title, a suit for breach of a contract of sale, or a suit upon a contract to construct a vessel, it is not within the admiralty jurisdiction of this Court.
The Wanda,
The only reason title over The Lady Lucille is at issue is that her purchaser and her builder are arguing over the terms of their contract. Interpretation of that contract will determine who rightfully holds permanent title. The fact that the parties have contractually agreed to pluck off the petals of this dispute and sort through them in arbitration does not change the identity of this action — that is, it does not transform a contract dispute into a maritime action. Characterizing the dispute before us as a “petitory” action for title apart from the underlying contract dispute so that it can become “maritime” and bestow jurisdiction upon this court to determine who holds title while arbitration is in progress is, to say the least, grasping. 4 *100 We cannot oblige. Accordingly, we REVERSE and RENDER judgment dismissing J.A.R.’s complaint for lack of subject matter jurisdiction.
Notes
.
See Kuehne & Nagel v. Geosource, Inc.,
. The action in
Jones
was brought by a purchaser who had already executed a sales agreement, chosen custom options, installed additional electronic gear, and paid ninety-five percent of the purchase price. After the seizure, the purchaser brought suit in admiralty, alleging petitory, pos-sessory, and tort claims. This court found admiralty jurisdiction because the plaintiff alleged ownership of the vessel, right to immediate possession, an unlawful taking and detention by defendant, and damages to the vessel.
See Jones,
. Record on Appeal vol. 2 at 000242, J.A.R., Inc. v. The Lady Lucille, No. 91-3375 (5th Cir. filed May 2, 1991) ["Opinion"]; id. at 000243: “In sum, the relief sought by J.A.R. does not require interpretation of a non-maritime contract, and this Court has admiralty jurisdiction to try title to the Vessel.”
. The district court distinguishes
Silver v. The Sloop Silver Cloud,
