This multiparty maritime suit arose out of an accident which killed an employee of an independent contractor while he was engaged in specialized testing of an oil well drill aboard a submersible drilling barge. In the aftermath the decedent’s widow and minor children (heirs) sued the barge owner; the barge owner sued the decedent’s employer; and the decedent’s compensation insurer intervened for benefits paid. Following a settlement between the decedent’s heirs and the barge owner, the district court granted the barge owner Ryan1 indemnification over against the decedent’s employer, and denied the compensation insurer’s claim for intervention. The employer and the compensation insurer appeal. While we do not disagree with all of the findings of the trial court, we do conclude that we must reverse and remand for the reasons hereinafter stated.2

I. Facts

Ray Whisenant, an employee of Loomis Hydraulic Testing Co., Inc. (Loomis), was crushed to death while working on a submersible drilling barge (vessel) owned by Brewster-Bartle Offshore Company (Brewster-Bartle). At the time of the accident the drilling barge was drilling an oil well off the coast of Louisiana pursuant to a contract with Texaco Inc. (Texaco). Texaco, in turn, had contracted with Loomis to perform certain specialized testing services on the drill pipe being used in the drilling of the well. The contract stipulated that the testing would be performed while the pipe was on board the drilling barge. No privity of contract existed between Loomis and Brewster-Bartle.

On the evening of September 7, 1964, Loomis sent a two-man testing team, along with the necessary testing equipment, to perform the test; Ray Whise-nant was the “operator” of the team, and his brother-in-law, W. A. Russ, was his helper. They commenced their work at approximately 1:00 a. m. on the morning of September 8, 1964.

Loomis’ testing procedure called for a small sheave or pulley to be hung at the top of the derrick so that a small cable (wireline) could be run through it. One end of the wireline would then be attached to a winch operated on the ground by a Loomis employee and the other end would be attached to the testing tool which would be lowered into the drill pipe as it stood upright in the derrick.

As is customary when a specialized crew comes aboard a rig, the “operator” of the crew, here Whisenant, discussed his proposed plan of procedure with the rig personnel before commencing to work.3 Whisenant then met with Athos *397Danos, the Brewster-Bartle driller, to discuss how the pulley, which was too heavy for one man to carry, was to be secured at the top of the derrick. After some discussion Whisenant told Danos that he was going to tie the pulley to the top of the traveling block4 and have Danos raise the block to the top of the derrick by means of the rig’s drawwork (a large winch). Whisenant advised Danos that he himself planned to ride the derrick’s elevator up to the monkey board (platform) and then climb the ladder on the outside of the derrick to a point below the crown of the derrick. From that point Whisenant planned to give Danos a hand signal for him to raise the traveling block upward by operating the drawworks from below until it reached a point four or five feet from the bottom of the sills at the top of the derrick. At that point Whisenant intended to give Danos a second hand signal to stop the upward movement of the block. Once the traveling block stopped, Whisenant planned to step out on the top of the block, using the top of the block as a work platform, and hang the pulley from the crown of the derrick.5 Danos approved the plan of procedure suggested by Whisenant and testified that he saw nothing inherently unsafe about the mode of operation; he did, however, offer to send one of his crew members up with Whisenant to assist him but Whisenant indicated that this would not be necessary.

In accordance with his plan Whisenant chained the pulley to the top of the traveling block and climbed the ladder to the top girder directly below the crown. Next he stepped from the ladder to the girder, and after positioning himself firmly, signalled Danos to raise the traveling block. Upon seeing the signal to raise the traveling block Danos released the brake and the clutch on the drawworks fixing it in “idle” speed so that the traveling block began moving slowly upward. After the traveling block began to rise Danos looked for, but did not see, any further hand signal indicating that he should stop the motion of the traveling block. As a consequence, the traveling block struck the sill at the top of the derrick; Whisenant, who had jumped onto the top of the traveling block, unseen by Danos was crushed.

Following the accident the decedent’s widow (acting individually and as Tutrix of her minor children) filed this suit on September 1, 1965, against the barge owner, Brewster-Bartle, and Texaco alleging that Whisenant’s death was caused by their negligence. Before answer was filed Employers National Insurance Company, Loomis’ compensation insurer, intervened claiming sums expended for funeral expenses and death *398benefits paid under the Louisiana Workmen’s Compensation Act. Shortly thereafter on August 9, 1967, Brewster-Bartle filed a third party complaint against Loomis. On June 3, 1968, Brewster-Bartle settled the cause of action brought against it by the Whisenant heirs for the sum of $22,500 net to the heirs over and above compensation payments made, and the suit was dismissed. Brewster-Bartle did not notify Loomis or Employers National, the compensation carrier, of the settlement negotiations; nor did it tender to either for approval the proposed settlement agreement or offer Loomis the defense of the suit.6 After the settlement was concluded, the Whise-nant heirs moved the district court to dismiss their claim against Brewster-Bartle. Accordingly, their claim was dismissed but the claim of the intervenes as well as the third party claim against Loomis were reserved. Thereafter on July 5, 1968, Brewster-Bartle filed a supplemental and amended third-party • complaint against Loomis for indemnification.

, After hearing the case without a jury the district court rendered findings of fact and conclusions of law denying the claim of Employers National for intervention and granting Brewster-Bartle indemnity over against Loomis, plus attorney’s fees and costs. In support of its conclusions the trial court found that the procedure used by Loomis to attach the pulley was unsafe and that it was this procedure which proximately caused the accident.7 The court also found that Whisenant’s action in stepping on the block while it was in motion amounted to contributory negligence on Whise-nant’s part and was likewise a proximate cause of the accident.8 And finally, the court rejected the contention that the conduct of Brewster-Bartle’s driller (Danos) was a proximate cause of the accident.9 Instead the court reached the following conclusion:

[T]he unsafe method of procedure devised and executed by Loomis’ employee Whisenant, and the decedent’s contributory negligence set the sequence for the resultant accident and *399the shipowner’s negligence through Danos, if any, could not possibly have converted Loomis’ ill conceived and unsafe method of operation into a safe and sound method of operation. The warranty of workmanlike or seaworthy performance was already well breached by Loomis without regard to the latter fault of Danos, if any.

Thus, the court concluded that since Loomis’ breach of its implied warranty of workmanlike service proximately caused the accident and thereby rendered Brewster-Bartle’s vessel unseaworthy, Brewster-Bartle should be indemnified by Loomis pursuant to the Ryan10 doctrine.

II. Ryan Doctrine

On appeal Loomis argues that the district court erred in failing to grant its motion to dismiss BrewsterBartle’s third party complaint. Loomis’ first contention is based on the general proposition that the District Court should not have applied the Ryan doctrine of indemnification to the facts of this case. It insists that Ryan should not be extended beyond the traditional stevedore-vessel relationship to a situation in which a specialized service company comes aboard a drilling vessel and renders it unseaworthy. It is urgently insisted that there must be privity of contract between Brewster-Bartle and Loomis. We disagree with these contentions and agree with the trial court’s reasoning on this phase of the case.

In Ryan Stevedoring Co. v. Pan Atlantic Steamship Co.11 the Supreme Court allowed a shipowner to maintain an action for indemnity against the employer of injured persons who were temporarily aboard the vessel to do the work of seamen and whose injuries arose out of unseaworthiness created by their employer. The Court said that even in the absence of an express agreement of indemnity, a contractor entering into a service agreement with a shipowner was obligated to reimburse the shipowner for foreseeable damages resulting from the contractor’s failure to perform its services in a workmanlike manner. The theory behind the warranty of workmanlike service and the duty of indemnification owed by the contractor has been expressed often.12 These cases emphasize that the Ryan doctrine was carefully conceived as an admiralty concept to serve special problems in maritime law arising from the absolute and nondelegable duty of seaworthiness imposed by the general maritime law upon all vessel owners. Thus, in Italia Societa v. Oregon Stevedoring Co.13 the Supreme Court underscored the rationale behind the Ryan doctrine with the following statement:

[W]e deal here with a suit for indemnification based upon a maritime contract * * * in an area where rather special rules governing the obligations and liability of shipholders prevail, rules that are designed to minimize the hazards encountered by seamen, to compensate seamen for the accidents that inevitably occur, and to minimize the likelihood of such accidents. By placing the burden ultimately on the company whose default caused the injury, Reed v. The S. S. Yaka, 373 U.S. 410, 414, 83 S.Ct. 1349, 10 L.Ed.2d 448, *400452, we think our decision today is in furtherance of these objectives.14

While not denying the equitable spirit behind the Ryan doctrine, Loomis nevertheless emphasizes this court’s past reluctance to expand the doctrine beyond its original factual setting.15 In Loff-land Brothers Co. v. Roberts 16 we stated

Recognizing this unique obligation on the part of a shipowner, we have held that the Ryan doctrine is closely tied to a vessel and this obligation which the shipowner owes to those employed on the vessel. * * * We are accordingly extremely hesitant to extend the burdensome Ryan doctrine to situations not substantially similar to those which gave birth to the doctrine.

Notwithstanding these general admonitions we are convinced that the doctrine was properly analyzed in this case.17 The court found that (1) in contracting to perform services beneficial to the vessel, Loomis warranted to perform in a workmanlike manner; (2) Loomis’ unsafe procedure and plan for “rigging up” the vessel rendered it unseaworthy and proximately caused Whisenant’s death; (3) in rendering the vessel unseaworthy Loomis breached its implied warranty of workmanlike services and was therefore obligated under Ryan to indemnify the barge owner for any damages sustained as a result. Thus, given the implied warranty of workmanlike service owed by the special contractor (Loomis) to the drilling barge, we fail to see, on the facts now before us, any reason to treat the scope and measure of recovery for its breach in a manner conceptually different from that applied to the warranty of workmanlike performance owed by the stevedore to the vessel owner in Ryan18 and Crumady v. Joachim Hendrik Fisser.19 Both the submersible barge owner (Brewster-Bartle) in the ease at hand and the vessel owner in Ryan relinquished control of their vessel to the tortfeasor ; 20 yet in each case they remained absolutely liable for the condition of their vessel under the nondelegable duty to provide a seaworthy vessel. In both cases, therefore, we think it appropriate that the party whose fault caused the injury should be held responsible to indemnify the party compelled to pay an *401injured claimant because of its technical or vicarious liability.21

Loomis’ second contention, related to the first but more specific, is that the absence of a contractual relationship between Loomis and BrewsterBartle 22 should have been fatal to Brewster-Bartle’s Ryan claim of indemnification against Loomis since the warranty of workmanlike performance does not extend to the vessel owner when there is no privity of contract between the vessel owner and the company performing the services. In maintaining that it is under no obligation to indemnify BrewsterBartle, Loomis argues that it was not a party to Brewster-Bartle’s agreement with Texaco, and that Brewster-Bartle was not a third party beneficiary of the Loomis-Texaeo contract. This argument, however, rests on a misunderstanding of the nature of the obligation to indemnify and totally ignores the Supreme Court holding in Crumady v. Joachim Hendrik Fisser.23 The basis of the obligation is an implied warranty of workmanlike service.24 Moreover, the obligations which arise from the implied warranty are not limited to the confines of the usual action on contract; the zone of responsibility may extend to parties who are not in direct contractual relationship. In Crumady, the Supreme Court settled this precise question:

The warranty which a stevedore owes when he goes aboard a vessel to perform services is plainly for the benefit of the vessel whether the vessel’s owners are parties to the contract or not. That is enough to bring the vessel into the zone of modern law that recognizes rights in third-party beneficiaries.25 (Emphasis added)

III. Failure to Tender Settlement Agreement

Appellant Loomis contends that the district court erred in awarding Brewster-Bartle indemnity for its settlement with the Whisenant heirs in the absence of evidence that Brewster-Bartle tendered the proposed settlement to Loomis for approval or negotiation, or offered it the opportunity to defend the action. We tend to agree. In Tankrederiet Gefion A./S v. Hyman-Michaels Company,26 a case involving principles of indemnity27 similar to those under consideration here, the indemnitee (the original defendants) settled the claim of the original plaintiffs without first tendering the settlement for approval or offering the defense in exchange for a hold harmless agreement. In these circumstances the court ruled that the settling indemnitee must prove actual liability in order to recover from the indemnitor. In a carefully reasoned opinion, the Sixth Circuit distinguished the facts of its case 28 from cases in which (1) the original defendant’s claim for indemnification *402was founded on a judgment, or (2) the indemnitor was tendered the defense and refused it, or (3) the indemnitee’s claim against the indemnitor was founded upon a written contract. In addition, the court recognized the principle that the law encourages settlements, but reasoned that

[A] tender of the defense in exchange for a hold-harmless agreement is a feasible protection for the party desiring to settle, as well as for the proposed indemnitor. It certainly seems appropriate for B, the party desiring to settle and possessing the facts pertaining to the settlement, to be required to tender C the choice of approving the settlement or of going forward with the defense in exchange for a hold-harmless agreement. We assume that such a hold-harmless agreement would constitute C’s financially responsible guarantee that B would under no circumstances be forced to pay more than the sum for which it was prepared to settle. If such a tender were refused and B settled, then we think the proofs required in the subsequent suit against C would appropriately be potential liability and reasonableness of the settlement.

The ultimate problem with any other rule than that which the District Judge laid down here is that potentially it would allow B (the original defendants) to spend C’s (the third party defendant) money without the final judgment of a court or C’s agreement. Deciding whether to try a case to judgment or to settle it involves elements of legal evaluation, of financial capacity to take risk, and of appetite for court room conflict which vary widely among litigants. We hold that under the facts of this case B cannot compel C to accept B’s evaluation of these critical factors. Any other rule would deny C any opportunity to contest B’s liability to A — a liability which C may be required to pay.29

In settling with the heirs of Whisenant without giving notice to Loomis or Employers National, Brewster-Bartle denied them the opportunity to participate in the settlement negotiations or to defend against BrewsterBartle’s primary liability. That Loomis would have chosen to contest Whisenant’s claim against Brewster-Bartle is strongly suggested by the record. Immediately after settlement Brewster-Bartle amended its third party complaint against Loomis to allege for the first time that Loomis rendered the barge unseaworthy by its negligence. At the trial, counsel for Loomis complained of this fact and asserted that prior to the time of the settlement there had been no claim that the vessel was unseaworthy or that Loomis had done anything to make it so.30 The *403claim against Brewster-Bartle at the time of the settlement was purely and simply a claim for negligence. Otherwise stated, as the record shows, it was admitted by all that the settlement between Whisenant and Brewster-Bartle was not “a seaman’s settlement” based on elements of maritime liability; nevertheless, in its amended complaint Brewster-Bartle sought indemnification on a maritime theory (the Ryan doctrine) the elements of which had never been demonstrated because of the settlement.31 We conclude, therefore, that under these facts and in the circumstances of this case, the finding of the trial court that the settlement between BrewsterBartle and Whisenant was reasonable is not sufficient to support a judgment against Loomis since defense of the Whisenant claim was not tendered to it and Loomis was not given the opportunity to review, pass upon, or participate in the settlement itself. Thus, we expressly pretermit any holding on this issue and remand this phase of the case with directions that the court require BrewsterBartle (1) to establish actual liability to Whisenant;32 (2) to show the reasonableness of the settlement; and (3) to demonstrate that Loomis was in no way prejudiced by Brewster-Bartle’s failure to either inform them of the settlement negotiations, or to tender them the defense before final settlement. We are in accord with the following succinct statement of the court in Jennings v. United States:

The indemnitee’s unilateral acts, albeit reasonable and undertaken in good faith, cannot bind the indemnitor; notice and an opportunity to defend are the indispensable due process satisfying elements.33

IV. Insurance Carrier’s Intervention

As a final contention appellants argue that the court erred in denying Employers National complaint of inter*404vention by which it sought to recover money paid to Whisenant’s estate under the Louisiana Workman’s Compensation Act. The district court denied this claim without explanation or supporting citation.34 Our reading of the cases pertinent to this claim35 indicates that the workman’s compensation insurance carrier may have a valid subrogation claim under the facts presented.36 Accordingly, we must remand for a full determination of this question. On remand the trial court should determine whether Employers National is entitled to subro-gation for the medical and funeral expenses paid as well as for attorney fees incurred in the litigation; and if not, reasons for such denial should be given.

Reversed and remanded for further proceedings not inconsistent with this opinion.37

ON PETITIONS FOR REHEARING AND PETITION FOR REHEARING EN BANC

The Petition for Rehearing filed by Loomis Hydraulic Testing Co., Inc. and Employers National Insurance Company, Appellants, is denied and no member of this panel nor Judge in regular active-service on the Court having requested that the Court be polled on rehearing en banc, (Rule 35 Federal Rules of Appellate Procedure; Local Fifth Circuit Rule 12) the Petition for Rehearing En Banc is denied.

The Petition for Rehearing filed by Brewster-Bartle Offshore Company et al., Appellees in the above numbered and captioned case is also hereby denied.