Arabie J. Manuel appeals the district court’s grant of summary judgment to his employer, P.A.W. Drilling & Well Service, Inc., and its insurer dismissing Manuel’s action on the ground that he was not, a seaman because the barge upon which he worked was not a vessel. We reverse, render, and remand.
I.
Arabie Manuel began his employment with P.A.W. Drilling & Well Service, Inc. (“P.A.W.”) in June of 1995, approximately two months before his alleged injury. Manuel worked during these two months as a floorhand on a workover rig identified as “Rig 3.” Rig 3 consisted of a portable truck-mounted workover rig owned by P.A.W. that was driven onto the deck of a leased barge and bolted into place. The summary judgment evidence established that the workover rig had been bolted to this particular barge for more than two years. The leased flat-deck barge was equipped with spuds used to secure the barge to the water bottom once it reached the worksite.
Rig 3 had no motor power and was moved by tugboat from location to location. The barge itself did not contain any steering mechanisms, navigational devices, bilge pumps, or crew quarters, except for a small shed in which the crew changed clothes. The barge had a keyway in its stern to allow the barge to be positioned over the wellhead. As a workover rig, Rig 3 was equipped with essentially the same type of equipment as a drilling rig. This included a derrick with traveling block, a drawworks-type winch to run the traveling block up and down the derrick, a driller’s console, a mud pump and mud tank, a cement unit for pumping cement into wells, and a crane. P.A.W. used Rig 3 primarily to plug and abandon wells.
Rig 3’s crew consisted of four men: a toolpusher, a driller, and two floorhands. The crew did not live aboard Rig 3. Each morning, a small boat picked up the crew at a dock and transported them to wherever Rig 3 was located. Upon arriving on Rig 3, the crew would raise the derrick and anchor the barge by dropping the spuds. Each evening, the transport boat would return the men to land, where they slept in lodgings provided by P.A.W. The crew usually did not remain on Rig 3 while it was under tow to a different location.
In the two years before August of 1995, Rig 3 worked at 19 different locations, all over water. It performed work on 63 different wellheads. 1 Work on each wellhead lasted anywhere from one day to thirty-five days. In the two months from June to August of 1995 that Manuel spent working for PAW., Rig 3 worked on several sites near Avery Island, Amelia, and Cut Off, Louisiana. On August 6,1995, Rig 3 was performing a plug and abandon job on a well near Cut Off, Louisiana. The crew was running production tubing in and out of the well to pump cement and mud into the well. Manuel allegedly hurt his back when he and a coworker, Lionel Leblanc, attempted to pick up a joint of tubing that had fallen from the barge.
In November of 1995, Manuel filed suit against P.A.W. and its insurer under the Jones Act, 46 App. U.S.C. § 688, and the general maritime law to recover for his injuries. Manuel alleged that he was a member of the crew of Rig 3. Both Manuel and P.A.W. filed motions for summary judgment addressing Manuel’s status as a seaman. P.A.W. argued that Rig 3 was not a vessel as a matter of law, and, therefore, Manuel’s Jones Act claim failed because he could not establish that he was assigned to a vessel in navigation. The district court granted summary judgment in favor of P.A.W. and dis *347 missed all of Manuel’s claims. This appeal followed.
II.
A.
We review the district court’s grant of summary judgment
de novo. Pavone v. Mississippi Riverboat Amusement Corp.,
B.
To recover as a seaman under the Jones Act, a plaintiff must demonstrate an “employment-related connection to a vessel in navigation.”
Chandris Inc. v. Latsis,
C.
A “vessel” traditionally refers to structures designed or utilized for “transportation of passengers, cargo or equipment from place to place across navigable waters.”
Cook v. Belden Concrete Prods.,
In evaluating whether a structure is a vessel, we begin by examining “the purpose for which the craft is constructed and the business in which it is engaged.”
The Robert W. Parsons,
*348 1.
In a long line of eases, we have held a variety of special purpose structures, far removed from the conventional notion of ships and seagoing barges, to be vessels.
4
As previously stated, “unconventional craft [such] as submersible drilling barges and floating dredges which are designed for navigation and commerce are vessels within general maritime and Jones Act jurisdiction and retain such status even while moored, dry-docked, or otherwise immobilized and secured to land.”
Cook,
The seminal case of
Offshore Co. v. Robi-son,
In
Producers Drilling Co. v. Gray,
The same analysis has been applied to other types of special purpose craft. In
Brunet v. Boh Bros. Constr. Co., Inc.,
The above cases are typical of the numerous “special purpose vessel” cases this Circuit has decided. They exhibit a common theme: Despite the outward appearance of the structure at issue, if a primary purpose of the craft is to transport passengers, cargo, or equipment from place to place across navigable waters, then that structure is a vessel. 6 *349 In the special purpose craft cases, particularly the drilling barge cases, the transportation function of the structure was more than merely incidental to its purpose. Each craft was used as a work platform when its crew drilled for oil and gas. However, before the crew could drill, the barge was used to transport its specialized drilling equipment over water to the drilling site.
2.
Another line of cases developed in this Circuit concludes that certain structures that float upon the water are not vessels. The clearest examples of such floating craft that do not qualify as vessels are dry docks and similar structures that maritime law has never considered, at least while secured to land, to be vessels.
Cook v. Belden Concrete Prods., Inc.,
Bernard v. Binnings Constr. Co., Inc.,
[a] review of these decisions indicates three factors common to them: (1) the structures involved were constructed and used primarily as work platforms; (2) they were moored or otherwise secured at the time of the accident; and (3) although they were capable of movement and were sometimes moved across navigable waters in the course of normal operations, any transportation function they performed was merely incidental to their primary purpose of serving as work platforms.
Id. at 831. From this, the court concluded that the work punt was not a vessel because it was not designed for navigation and it did not have any significant transportation function. Id. at 832.
Several of our eases have followed this reasoning.
See, e.g., Gremillion v. Gulf Coast Catering Co.,
P.A.W. argues that our decision in
Ellen-der v. Kiva Constr. & Eng’g., Inc.,
The court concluded that “the four-barge platform assembly which included the ATHENA 3 [the spud barge] clearly was not a Jones Act vessel at the time that [the plaintiff] suffered his accident.”
Ellender,
We conclude our discussion of the work platform cases by recalling their origin. 8 In Cook, we held that the work platform was analogous to a dry dock. The work platform, like the dry dock, is considered an extension of land. Carrying “passengers, cargo, or equipment” from place to place across navigable waters is not central to its purpose so that it is not routinely exposed to the hazards of such travel.
D.
With this background, we now consider what conclusions can properly be drawn from the above cases. We start from the bedrock premise that in determining what is a vessel, we ask what is the “purpose for which the craft is constructed and the business in which it is engaged.”
The Robert W. Parsons,
The second prong of our inquiry, the business in which the craft is engaged, is usually the most difficult. Here, evaluating the importance of the craft’s transportation function is the key to determining the craft’s status. In all of our work platform eases, the transportation function of the craft at issue was merely incidental to its primary purpose of serving as a work platform.
9
Conversely, where the use of the craft in transporting passengers, cargo, or equipment was an important part of the business in which the craft was engaged, we have found that craft to be a vessel, even if it also served as a work platform. For example, our drilling rig cases recognize the premise that a vessel can serve the dual function of transporting cargo, equipment, or persons across navigable waters and acting as a work platform.
Colomb,
III.
A.
We turn now to apply these conclusions to the summary judgment evidence produced in this case to determine whether the district court correctly ruled that Rig 3 was not a vessel as a matter of law. Because we find Rig 3 indistinguishable from special purpose craft such as submersible drilling barges and jack-up rigs that this Court has previously found to be vessels, we conclude that the district court erred in finding that Rig 3 was not a vessel as a matter of law.
See, e.g., Colomb,
As for the “business in which it was engaged,” Rig 3 was plugging and abandoning old wells situated at various locations in navigable waters. The transportation function of Rig 3 was not merely incidental. Rig 3’s mobility was essential to the work it was designed and built to perform. It was a highly mobile, self-contained unit equipped with most of the equipment found on a drilling rig. The mobility of Rig 3 allowed it to service wells located in various places on navigable waters. Rig 3 did more than merely float or move upon navigable waters: It transported all of the necessary equipment across navigable waters to each location. While Rig 3 did serve as a work platform when stationed over wellheads, this does not detract from the importance of its transportation function. Other special purpose craft such as submersible drilling barges, jack-up rigs, and spud barges remain stationary while performing work, yet retain their vessel status.
See, e.g., Ducote,
P.A.W. argues that Rig 3 lacks features that objectively suggest that one of its primary purposes was transportation over water. These features include: navigational aids; a raked bow; lifeboats and other lifesaving equipment; bilge pumps; crew quarters; and registration with the Coast Guard as a vessel.
Bernard,
In sum, the summary judgment evidence clearly reveals both “the purpose for which the craft [was] constructed and the business in which it [was] engaged.” P.A.W. assembled Rig 3 as a highly mobile unit to plug and abandon wells at various locations in navigable waters. Consistent with this purpose, Rig 3 was engaged in the business of plugging and abandoning these wells located in navigable waters. The summary judgment evidence demonstrated that transporting the necessary equipment from location to location across navigable waters was essential to Rig 3’s work. Rig 3 is, therefore, a vessel as a matter of law, and the district court erred in reaching a contrary conclusion.
B.
Because it found that Rig 3 was not a vessel as a matter of law, the district court did not consider whether Manuel satisfied the other requisite for seaman status — a substantial employment-related connection to a vessel in navigation.
Chandris,
The summary judgment evidence established that Manuel was assigned to and worked aboard Rig 3 the entire two months he worked for P.A.W. Also, it is undisputed that Manuel’s duties contributed to the function of Rig 3. P.A.W.’s argument that Manuel does not have the requisite connection to a vessel is limited to the assertion that the possibility that Manuel could have been assigned to other work locations renders his assignment to Rig 3 less than permanent. This argument is seriously flawed. In Chandris, the Supreme Court makes it clear that the adequacy of the plaintiffs connection to a vessel is properly assessed on the basis of his work assignment at the time of his injury:
Such a person should not be denied seaman status if injured shortly after the reassignment [to a vessel], just as someone actually transferred to a desk job in the company’s office and injured in the hallway should not be entitled to claim seaman status on the basis of prior service at sea.
Chandris,
IV.
For the reasons stated above, we conclude that the district court erred when it concluded that Rig 3 was not a vessel as a matter of law. Also, the uncontroverted evidence establishes that Manuel had a substantial “employment-related connection” to Rig 3, a vessel in navigation, and was a seaman as a matter of law. Therefore, we REVERSE the district court’s grant of summary judgment to P.AW. and RENDER judgment, granting Manuel’s motion for summary judg *353 ment on seaman status. We REMAND this ease for further proceedings consistent with this opinion.
REVERSED, RENDERED, and REMANDED.
Notes
. Several of these locations had multiple wellheads. Rig 3 was either towed, or, if the wellheads were located close together, maneuvered over each wellhead to perform its work.
.
See, e.g., Mouton v. Tug “Ironworker”,
.
See, e.g., Pavone v. Mississippi Riverboat Amusement Corp.,
.
See Colomb v. Texaco, Inc., 736
F.2d 218 (5th Cir.1984);
Hicks v. Ocean Drilling and Exploration Co.,
.
See, e.g., Colomb v. Texaco, Inc.,
.See Michel v. Total Transp., Inc.,
. The court's conclusion that the flotilla’s transportation function was merely incidental to its work was driven by two factors. First, the job constructing the platform was the single assignment for this flotilla. The flotilla did not travel from location to location as Rig 3 was assigned to do.
Second, we infer from the facts stated in the opinion that the job was relatively close to shore and an insignificant amount of the flotilla’s time was devoted to movement of the equipment and materials to the jobsite. The flotilla was engaged almost exclusively in performing construction work.
. We must also note that many of our work platform cases were decided before the Supreme Court's decision in
Southwest Marine, Inc. v. Gizoni,
. Indeed, in the vast majority of these work platform cases, the structure at issue was moored or otherwise fastened in a more or less permanent manner to either the shore or the water bottom.
See, e.g., Burchett,
