OPINION ON REHEARING

JANE BLAND, Justice.

Relator Carnival Corporation seeks mandamus relief from a death penalty sanction imposed by the trial court. 1 Carnival contends the trial court abused its discretion when, as its first order in this discovery dispute, it struck Carnival’s pleadings and entered judgment against Carnival on all liability issues. We conditionally granted mandamus relief on January 27, 2006. The real party in interest *232 moved for rehearing. We grant the motion, withdraw the opinion dated January 27, 2006, and issue this opinion in its stead. Our disposition remains unchanged.

We conditionally grant mandamus relief.

FACTS

Carnival operates a cruise line from the Port of Galveston, Texas. In February 2002, Melody Allison, the real party in interest, joined her mother, Dorothy Mueller, on a four-day, round-trip cruise to Mexico on a Carnival ship known as the “Celebration.” Mueller had suffered a stroke in early 2000 that required her to wear a feeding tube, so Allison inquired with Carnival’s “Special Needs Desk” before the cruise to ensure that care would be available for her mother aboard the ship. Allison understood that care would be available.

Carnival boarded one doctor and three nurses for the voyage. During the cruise, Mueller’s feeding tube became dislodged. According to Allison, Carnival’s medical personnel were unable or unwilling to reinsert the tube or make other treatment available. Three weeks after the cruise, medical personnel surgically reinserted the feeding tube. The surgery triggered a massive stroke, incapacitating Mueller.

In December 2002, Allison sued Carnival, North Channel Travel (her travel agent), John Doe (described as “a [ship] physician whose identity is not currently known”), and Jane Doe (described as “a [ship] nurse whose identity is not currently known”). Allison alleged negligence, breach of contract, breach of warranty, deceptive trade practices, and fraud.

In February 2003, in response to Allison’s requests for disclosure, Carnival identified Dr. Chris Uche, of the United Kingdom, and Constance Jackson, of the United States, as the medical personnel aboard the Celebration during the relevant period. Allison added Uche and Jackson as defendants, and served Jackson with suit. 2 In July 2003, Carnival supplemented its response with the name and address of nurse Claudia Petrescu of Romania. 3 Allison added Petrescu as a defendant.

In August 2003, Allison unsuccessfully attempted sendee on Uche at the London address Carnival provided. According to the process server, Uche did not live at that address, although a person at the address stated that she knew Uche. Allison moved for substituted service of Uche through Carnival. 4 Carnival responded that such service would violate due process under the United States Constitution and the Hague Convention 5 because Uche was an independent contractor and a British national. The trial court denied the motion.

In June 2004, Allison moved for substituted service of Uche and Petrescu pursuant to the Hague Convention, Letters Rogatory, or through private process service. 6 Although the trial court granted the motion, Allison never attempted such service. Rather, in March 2005, Allison noticed Uche and Petrescu for deposition *233 through Carnival. Carnival filed a motion to quash on the grounds that these individuals were independent contractors and foreign nationals. Allison moved to compel Carnival to produce Uche and Petres-cu for deposition and for death penalty sanctions upon any refusal, but the record does not reflect that the trial court ever heard and ruled upon the motion.

In August 2005, Allison located Uche in Georgia and served him with suit, and Allison again noticed the deposition of Pe-trescu through Carnival. Carnival again moved to quash the deposition, representing that Petrescu had retired from Carnival and was living in Romania. Allison filed a supplemental response to Carnival’s motion to quash and again moved for death penalty sanctions for Carnival’s failure to produce Petrescu for deposition. The trial court granted a default judgment against Uche.

In November 2005, the trial court held a hearing on Carnival’s motion to quash. Uche appeared at the hearing with his own counsel. At its conclusion, the trial court granted Allison’s motion for death penalty sanctions as follows:

Carnival, by its persistent pattern of evading discovery, giving false responses to discovery, and refusing to engage in discovery in good faith, has stepped far over the lines that would allow this Court to assess death-penalty sanctions. Its behavior has been brought to Carnival’s attention repeatedly during the course of the case, and the Court has given Carnival opportunities to deal responsibly. Carnival’s refusal to produce witnesses at deposition combined with misleading and false answers to discovery require the imposition of substantial sanctions. Therefore it is, ORDERED that Defendant Carnival Corporation’s pleadings be stricken and a judgment in favor of Plaintiff on all liability issues is entered, with damages and attorney’s fees to be assessed after hearing.

It is from this order, signed November 21, 2005, that Carnival seeks mandamus relief.

STANDARD OF REVIEW

A party is entitled to mandamus relief if a trial court abuses its discretion and the party has no adequate remedy by appeal. Walker v. Packer, 827 S.W.2d 833, 839-40 (Tex.1992). A trial court abuses its discretion if “it reaches a decision so arbitrary and unreasonable as to amount to a clear and prejudicial error of law.” Id. When a trial court imposes discovery sanctions that are so severe as to preclude a decision on the merits of a party’s claims, a party’s remedy by appeal is inadequate, unless the sanctions are imposed simultaneously with the rendition of a final, ap-pealable judgment. TransAmerican Natural Gas Corp. v. Powell, 811 S.W.2d 913, 920 (Tex.1991). Thus, if a sanctions order is not immediately appealable, a party may seek relief from the order by mandamus. Id.

Here, the trial court’s order precludes a decision on the merits of Carnival’s defenses because it enters judgment in favor of Allison on all liability issues. The order is not final and appealable because the trial court ordered that damages would be assessed at a later hearing. See id. at 919-20. Hence, if the trial court abused its discretion in issuing the order, mandamus relief is appropriate. See id.

ANALYSIS

Carnival contends the trial court abused its discretion in striking its pleadings and entering judgment in favor of Allison on all liability issues. Specifically, Carnival contends the trial court erred in (1) concluding that Carnival must produce foreign-national, independent-contractor, codefen-dants for deposition without service of pro *234 cess pursuant to the Hague Convention or Letters Rogatory; (2) ordering death penalty sanctions without supporting evidence of a “pattern of evading discovery, giving false responses to discovery, and refusing to engage in discovery in good faith”; and (3) fading to consider lesser sanctions.

A trial court may sanction a party for failure to comply with discovery requests or orders. Tex.R. Crv. P. 215.3. Such sanctions include an order striking the pleadings, dismissing the action with or without prejudice, or rendering a default judgment. Tex.R. Civ. P. 215.2(b)(5). However, a trial court may not impose sanctions that are more severe than necessary to satisfy legitimate purposes. Cire v. Cummings, 134 S.W.3d 835, 839 (Tex.2004). Any sanction imposed must be “just.” Tex.R. Civ. P. 215.2(b). In evaluating whether sanctions are “just,” we consider (1) whether a direct relationship exists between the offensive conduct and the sanction imposed, and (2) whether the sanctions ordered are excessive to punish the improper conduct. TransAmerican, 811 S.W.2d at 917. The trial court must provide written findings to support its sanctions order. Cire, 134 S.W.3d at 840.

A. Direct Relationship

Under the first prong of the Trans-American analysis, a direct relationship exists if a trial court directs the sanction against the abuse found and it remedies the prejudice caused to the innocent party. TransAmerican, 811 S.W.2d at 917. Here, the trial court found that Carnival failed to make certain medical personnel, namely Uche and Petrescu, available for deposition and that Carnival furnished incorrect addresses in response to Allison’s discovery requests.

1. Failure to Make Uche and Petrescu Available for Deposition

Texas Rule of Civil Procedure 199.3 allows a party to compel a witness to attend an oral deposition by serving the witness with a subpoena. Tex.R. Civ. P. 199.3. Further, if the witness is retained by, employed by or otherwise subject to the control of a party, service of the notice of deposition upon the party’s attorney is tantamount to serving the witness directly. Id. Allison contends Carnival employed Uche and Petrescu, and thus Carnival had a duty to make them available for deposition. Allison further contends the notice of deposition sent to Carnival’s counsel was sufficient to invoke that duty. Carnival responds that Uche and Petrescu were independent contractors and not under Carnival’s control, nor represented by Carnival’s counsel; thus, Carnival owed no duty to produce them for deposition, and service via its counsel is improper.

As a preliminary matter, we note that the injury Allison complains of occurred in international waters. Admiralty law applies when a personal injury occurs on a cruise ship and a dispute arises between the injured passenger and the cruise ship company. 7 See Carnival Cruise Lines, Inc. v. Shute, 499 U.S. 585, 588-90, 111 S.Ct. 1522, 1525, 113 L.Ed.2d 622 (1991); see also Keefe v. Bahama Cruise Line, 867 F.2d 1318, 1320-21 (11th Cir.1989) (explaining that substantive law applicable to tort committed aboard ship sailing in navigable waters is general maritime law, which is developed by federal courts); Seven Seas Fish Market, Inc. v. Koch Gathering Sys., Inc., 36 S.W.3d 683, 686-87 (Tex.App.-Corpus Christi 2001, pet. *235 denied) (laying out locality and maritime nexus tests). The parties do not dispute that admiralty law governs this case.

The Fifth Circuit has held that medical personnel aboard ships are independent contractors. Barbetta v. S.S. Bermuda Star, 848 F.2d 1364, 1869-70 (5th Cir.1988) (explaining that “[a]n impressive number of courts from many jurisdictions have, for almost one hundred years, followed this same basic rule”). 8 Here, Carnival’s ticket information states that its “[djoctors are independent contractors.” Carnival’s employment contract with Uche states that Uche is an independent contractor. In addition, Carnival raised the independent contractor status of Uche and Petrescu in its responses to discovery, its correspondence with Allison, and in its motions. Applying Barbetta, Uche and Petrescu are independent contractors by virtue of their status as medical personnel aboard the Celebration. Medical personnel, as independent contractors, are not subject to the control of the ship company. Id. Hence, Carnival did not have a duty to compel their attendance at a deposition on the basis that Carnival was their employer, and notice of deposition on Carnival’s counsel could not be imputed to either Uche or Petrescu. See Tex.R. Civ. P. 199.3. Moreover, Allison added Uche and Petrescu as codefendants individually, entitling them to independent service of process. See Tex.R. Civ. P. 199.2-.3.

In her motion for rehearing, Allison contends that, in applying Rule 199.3, even if Uche and Petrescu were independent contractors and not “employed by” Carnival, Uche and Petrescu were nonetheless “subject to the control of’ Carnival such that notice of deposition on Carnival’s counsel could be imputed to Uche and Petrescu, and thus Carnival had a duty to produce Uche and Petrescu for deposition. See Tex.R. Civ. P. 199.3 (providing that “[i]f the witness is a party or is retained by, employed by, or otherwise subject to the control of a party, ... service of the notice of oral deposition upon the party’s attorney has the same effect as a subpoena served on the witness”). Specifically, Allison contends that Carnival’s control is demonstrated by the evidence that Uche and Petrescu were contractually bound to work and five on Carnival’s ships six days per week and could not leave without permission from Carnival. Allison did not cite authority for the proposition that these facts show de facto legal control to a degree required to impute notice served on counsel to a witness under Rule 199.3, and the trial court did not make such a finding in its order.

Even if we were to conclude, however, that Uche and Petrescu could be subject to Carnival’s control for purposes of Rule 199.3, we cannot conclude that any relationship exists between a violation of that rule and the sanctions imposed. See TransAmerican, 811 S.W.2d at 917. Rather, the events in the trial court leading up to the sanctions are inconsistent with the death penalty sanction ultimately imposed. We note that the trial court never issued an order compelling Carnival to produce Uche and Petrescu for depositions. In addition, the trial court denied Allison’s *236 motion for substituted service of suit on Uche through Carnival. Further, the trial court granted Allison’s motion for substituted service of Uche and Petrescu pursuant to the Hague Convention. Allison simply never attempted such service. Thus, the record does not support the imposition of death penalty sanctions for any violation of Rule 199.3.

2. False Responses

Allison contends Carnival also abused the discovery process by misrepresenting the identification and location of Uche and Petrescu. The Texas Rules of Civil Procedure require a party to answer written discovery with “a complete response, based on all information reasonably available to the responding party or its attorney at the time the response is made.” Tex.R. Crv. P. 193.1. If a party later learns that the response was incorrect or incomplete when made or is no longer correct and complete, the party has a duty to amend or supplement the response. Tex.R. Crv. P. 193.5.

Here, in response to Allison’s requests for disclosure of any person with relevant information, Carnival provided the name, address, and phone number of Uche. Allison contends Carnival gave a false address. Six months later, Allison attempted to serve Uche at the address provided. Although Uche was not found at that address, the process server’s notes indicate that a person at the address confirmed that she knew Uche. At the hearing on the motion for sanctions, Uche’s counsel explained that Uche’s girlfriend was living at the address and that Uche was frequently gone, but that the address given was the correct address.

Five months after its initial response, Carnival supplemented its answers with the name and address of Petrescu. The record does not show that Allison attempted to serve Petrescu at the address given and provides no other support for Allison’s contention that the address was purposefully false when provided to her.

We conclude that neither of the trial court’s findings provides a basis for the sanction imposed. The order precludes Carnival’s ability to present the merits of its case. Discovery sanctions may not “adjudicate the merits of a party’s claims or defenses unless a party’s hindrance of the discovery process justifies a presumption that the party’s claims or defenses lack merit” or “absent a party’s flagrant bad faith or counsel’s callous disregard for the responsibilities of discovery under the rules.” TransAmerican, 811 S.W.2d at 918; Daniel v. Kelley Oil Corp., 981 S.W.2d 230, 234-35 (Tex.App.-Houston [1st Dist.] 1998, pet. denied). We conclude that the record here does not warrant such a presumption. See TransAmerican, 811 S.W.2d at 917-18. Moreover, Allison did not offer evidence at the hearing that her case has been prejudiced by relying upon “false” addresses. See id. at 917 (explaining that sanctions must be directed at remedying prejudice suffered). To the contrary, at the time of the hearing on the motion for sanctions, the record shows that Allison had served Uche and had a default judgment in place; Petrescu remained a defendant.

B. Excessive Sanctions

Under the second prong of the TransAmerican analysis, sanctions must not be excessive and the trial court must have considered whether lesser sanctions were available that would have fully promoted compliance. Id. Generally, before a sanction that prevents a decision on the merits is justified, lesser sanctions must first be tested to determine their efficacy. Cire, 134 S.W.3d at 840 (citing Chrysler Corp. v. Blackmon, 841 S.W.2d 844, 849 (Tex.1992)). In all but the most exception *237 al cases, the trial court must actually test the lesser sanctions before striking pleadings. Id. at 842 (applying GTE Commc’ns Sys. Cory. v. Tanner, 856 S.W.2d 725, 729 (Tex.1993)). In all cases, the record must reflect that the trial court considered the availability of appropriate lesser sanctions and must contain an explanation of the appropriateness of the sanctions imposed. Id.; Spohn Hosp. v. Mayer, 104 S.W.3d 878, 883 (Tex.2003).

Here, the trial court never considered or imposed lesser sanctions prior to striking Carnival’s pleadings. Although the trial court indicated at the hearing and in its order that Carnival’s conduct had been an ongoing issue and that the trial court had given Carnival prior opportunities to provide proper discovery responses, there are no prior orders in the record; nor is there any discussion indicating the consideration of lesser sanctions or an explanation of the appropriateness of the sanctions imposed in the absence of prior orders. To the contrary, the record shows that, in its January 16, 2004 order, the trial court denied Allison’s motion to serve the independent-contractor defendants through Carnival. The trial court granted Allison’s motion to serve Uche and Petres-cu via the Hague Convention and Letters Rogatory, but the record contains no evidence that Allison attempted to serve either defendant pursuant to the trial court’s order granting substituted service.

In particularly egregious cases, a trial court may order death penalty sanctions without first testing lesser sanctions, but no evidence demonstrates that this is such a case. See Cire, 134 S.W.3d at 838, 840-41 (demonstrating exceptional case in which death penalty sanctions were upheld after single lesser sanction directed only at counsel when party disregarded four discovery orders to produce certain evidence and then deliberately destroyed evidence).

CONCLUSION

We hold that the trial court abused its discretion in imposing death penalty sanctions against Carnival. We therefore conditionally grant Carnival’s petition for writ of mandamus and direct the trial court to vacate its November 21, 2005 order striking Carnival’s pleadings and entering a default judgment against Carnival. We lift our stay of proceedings ordered January 9, 2006. We are confident that the trial court will promptly comply, and our writ will issue only if it does not.

. The respondent is Judge Lonnie Cox of the 56th District Court of Galveston County.

. It was ultimately determined that Jackson was not on duty when Mueller’s feeding tube became dislodged.

. Allison also named Helen Stevens, of the United Kingdom, but has determined that Pe-trescu was the nurse who came to the cabin to attend to Mueller.

. See Tex.R. Civ. P. 106.

. “The Hague Convention on the Service Abroad of Judicial and Extrajudicial Documents in Civil or Commercial Matters,” 20 U.S.T. 361 (hereinafter "the Hague Convention”).

. See Tex.R. Civ. P. 108a.

. State courts have concurrent jurisdiction over in personam admiralty matters pursuant to 28 U.S.C. § 1333 (1982).

. As Allison correctly contends, there is some disagreement with Barbetta in Carnival’s corporate home state of Florida based on the rationale offered in Nietes v. American President Lines, Ltd., 188 F.Supp. 219 (N.D.Cal.1959). Allison cites Huntley v. Carnival Corp., 307 F.Supp.2d 1372 (S.D.Fla.2004); Hall v. Royal Caribbean Cruises, Ltd., 888 So.2d 654 (Fla.Dist.Ct.App.2004); and Carlisle v. Carnival Corp., 864 So.2d 1 (Fla.Dist.Ct.App.2003), pet. granted, 904 So.2d 430 (Fla.2005). The court in Huntley, however, concedes that Bar-betta js'the well-settled majority rule and describes Nietes as the "lone beacon of dissent.” Huntley, 307 F.Supp.2d at 1374.