This action arises from injuries sustained by appellant, Eugene Thezan, while serving as an officer and second engineer aboard the S/T OVERSEAS NATALIE, a vessel operated by the Natalie Tankship Corporation. Thezan filed suit in district court against his employer under the Jones Act, 46 U.S.C. § 688, on the grounds that his injuries were caused by the negligence of Natalie Tankship and the unseaworthiness of the S/T OVERSEAS NATALIE. Following a four-day trial, the jury returned a verdict finding the NATALIE a seaworthy vessel, but the Natalie Tankship Corp. negligent. The jury set Thezan’s damages at $60,000, but found Thezan’s own negligence made a 90% contribution to his injury, reducing his damage award to $6,000. The jury additionally awarded maintenance and cure in the amount of $10 per day for a period of 100 days. Thezan then filed motions for judgment notwithstanding the verdict, additur, and alternatively, for a new trial, all of which were denied. On appeal, Thezan argues (1) that the district court erred in failing to grant his motion for a judgment notwithstanding the verdict because the NATALIE was unseaworthy as a matter of law; (2) that the company’s negligence was the sole cause of the accident and that Thezan could not have been contributorily negligent as a matter of law; (3) that the district court’s response to written questions from the jury was improper; and (4) that the evidence did not support the amount of the jury’s quantum and maintenance and cure awards. Finding no merits to any of these contentions, we affirm the judgment of the district court.
I. Facts
Eugene Thezan had served for eleven years as an officer and second engineer aboard the S/T OVERSEAS NATALIE, an oil tanker which transports oil through the Panama Canal to the Gulf Coast. Among his duties was to maintain the vessel’s boiler system. This maintenance involves periodic cleaning which entails removing a number of bottom waterwall doors. Both parties agree that removal of these doors, which are made of steel and brick and weigh approximately 170 pounds, is an arduous job. On June 23, 1978, the NATALIE’S chief engineer, Joseph Kapiko, ordered Thezan to shut down and clean the boilers. At the time of the order, four men were working overtime in the engine room who were available to assist Thezan with the removal of the waterwall door. The first assistant engineer, Jesse Sweet, who testified that he had helped Thezan in the past with the doors, was also available. The evidence also shows, however, that Thezan had alone removed the doors many times in the past. In any event, Thezan did not request assistance and proceeded to remove one of the doors alone. During the course of this work Thezan noticed an unusual sensation in his neck, and by the next morning was suffering severe pain in his neck and shoulder and had no feeling in his right leg. Medical examinations onshore in Panama City indicated that Thezan had sustained a herniated cervical disc. 1 He was *179 operated on on June 30, and flown back to the United States to recuperate. On October 10, 1978, Thezan returned to duty as second engineer aboard the NATALIE. Seven months later, he quit and began work with another shipping company.
II. Unseaworthiness
Thezan first argues that the trial court erred in its failure to grant his motion for a judgment notwithstanding the verdict with respect to the jury finding of the NATALIE’S seaworthiness.
2
Specifically, he argues that the jury’s finding that the employer was negligent was “inconsistent” with its finding that the vessel was not unseaworthy. Implicit in this claim is Thezan’s assertion that the jury’s finding of negligence on the part of Natalie Steamship Company was necessarily predicated upon a finding that the company had failed to provide Thezan with the manpower required to remove the boiler door safely. Because an inadequate or improperly manned vessel is considered unseaworthy as a matter of law,
Comeaux v. T.L. James & Co., Inc.,
A motion for a directed verdict or judgment notwithstanding the verdict on an unseaworthiness claim may be granted only where “reasonable minds could not differ” that the injuries received by the plaintiff were or were not caused by the vessel in question being unseaworthy.
Robinson v. Zapata Corp.,
Neither side disputes that the machinery or equipment of the NATALIE was seaworthy. Thus, Thezan’s conception of unseaworthiness is based solely upon his assertion that the vessel was improperly manned so that he received inadequate help. Uncontradicted evidence produced at trial indicated that the NATALIE satisfied the Coast Guard regulations with respect to crewing requirement aboard oil tankers. 4 The chief engineer Kapiko and the first assistant engineer Sweet testified that Thezan, as an officer and second engineer, had the authority to order men on his watch to assist him and that additional men, subject to his authority, were available at the time of the accident. 5 Thezan argues that it was the chief engineer’s responsibility to provide him with adequate help in the form of a *180 specifically assigned crewman at the time he ordered the work, and that Thezan himself did not have the authority to order men to assist him. He also disputes the appel-lee’s assertion that adequate manpower was available.
Certainly the testimony presented at trial indicated that reasonable minds could arrive at a contrary verdict with respect to whether the NATALIE was improperly manned. In addition, we note that The-zan’s argument — that the jury’s finding that the defendant was negligent was based on the failure to provide Thezan with adequate assistance to remove the door — asks us to inquire into the “presumptions and inferences” that “flow from” the jury’s finding of negligence. It is a cardinal principal of jurisprudence that we are not allowed to speculate as to the thought processes of the jury. Moreover, it is well-established that Jones Act negligence and unseaworthiness are two distinct claims,
Usner v. Luckenback Overseas Corp.,
III. Contributory Negligence
Thezan next complains that the district court improperly denied his motions for judgment notwithstanding the verdict or a new trial on the issue of contributory negligence. As discussed earlier, the jury awarded Thezan $60,000, but reduced this award by 90% under the comparative negligence doctrine because it found that Thezan was 90% contributorily negligent. Thezan argues that the appellee did not meet its burden of proof with respect to the affirmative defense of contributory negligence. Specifically, Thezan argues that he had no duty to request help in removing the boiler door, and that he cannot be held responsible for the chief officer’s failure to assign personnel to assist him.
In Jones Act cases, directed verdicts are possible “only in the comparatively rare instance where there is a complete absence of probative facts” to support the non-movant’s position.
Robinson v. Zapata Corp., supra,
While the seaman’s duty to protect himself is slight, the duty does exist.
Bobb v. Modern Products, Inc.,
The evidence at trial indicated that The-zan had an in-depth knowledge of the proper way to remove the bottom waterwall door. He had been a second engineer for eleven years, and had himself removed the doors, without assistance, many times in the past. He was well aware of the potential danger involved in attempting their removal alone, but he at no time asked anyone for assistance. The jury obviously chose to believe the testimony of chief engineer Kapi-ko that Thezan had absolute control over his watch and the men working for him, and that he had the authority to order those men to help him. It also chose to believe that several men were available to help Thezan if he had requested help.
Thezan also complains that the district court erred in denying his motion for a new trial on the issue of his contributory negligence. The appropriate standard of review for this Court to test the sufficiency of the evidence in Jones Act and unseaworthiness claims is whether there is a “reasonable evidentiary basis” for the jury’s verdict.
VaHot v. Central Gulf Lines, Inc.,
Nor can we accept Thezan’s claim that the jury “somehow” improperly viewed the accident as having resulted from Thezan’s having “assumed the risk” of the removal of the boiler door without assistance. There was no mention at trial, either in the court’s instructions or in closing argument for either side, concerning assumption of the risk. In the absence of any indication that the jury was “confused” or that its verdict was based on an assumption of the risk theory, we will not speculate and disturb the jury’s finding.
IV. Jury Instructions
Approximately mid-way through the jury’s deliberations, the foreman sent the following written interrogatories to the Court:
3. “Could a specific repair or maintenance job be construed as a ‘given task’ within the context of the definition for unseaworthiness?”
4. “Same as question 3 except assume the specific repair is the removal of the water doors.”
After conferring with counsel for both sides, the judge 7 sent the jury a copy of the *182 court’s original charge on seaworthiness with instructions to read it carefully in order to answer the questions. Thezan argues that it was prejudicial error for the court not to have responded to the questions in the affirmative. He contends that this “omission” confused the jury and gave it the impression that it could not find that the order to clean the boiler would constitute unseaworthiness.
The necessity, extent and character of additional instructions to the jury is a matter within the trial court’s discretion.
Roberts v. Williams-McWilliams Co., Inc.,
V. Damages
The jury found that Thezan reached his maximum cure as of October 9, 1978. This was the date that he resumed his employment as officer and second assistant engineer on the NATALIE. Thezan argues that, although he was able to return to work, his cervical problems still required neurological monitoring at the time of trial.
The record shows that when Thezan returned to work in October, 1978, he did not require additional medical care or treatment. He worked for Natalie Tankship for seven months at that time, and then he quit and began work with another shipping company. In February, 1981, Thezan had a heart attack, but was declared “fit for duty” in October of 1981. At the time of trial, Thezan conceded that he was still able to return to sea. Additionally, his employer at the time of his heart attack indicated that a job was available for Thezan as late as January, 1982. While Thezan seems to claim that he still suffers from the injury which is the subject of this suit, the jury could find otherwise on the evidence. A maintenance award will be upheld so long as there is an evidentiary basis for the jury’s verdict.
Loehr v. Offshore Logistics, Inc., supra,
Thezan finally argues that the jury’s award was inadequate. This Court will overturn a jury verdict for inadequacy only upon the strongest of showings.
Martin v. City of New Orleans,
The judgment of the district court is
AFFIRMED.
Notes
. Medical testimony at trial indicated that The-zan had previously been suffering from a cervical mylopathy, which was aggravated by the *179 herniated cervical disc.
. The appellees contend that Thezan failed to move for a directed verdict at the conclusion of the case, thus precluding appellate review of this issue. Fed.R.Civ.P. 50(b). Our review of the record reveals that Thezan did move for a directed verdict at the close of appellee’s case, but that his grounds for his motion were less than precise. Rule 50(a) of the Federal Rules of Civil Procedure requires that specific grounds be stated in a motion for a directed verdict. The purpose of this requirement is to apprise the trial court of the movant’s position.
Ralston Purina Co. v. Parsons Feed & Farm Supply, Inc.,
. The standard for granting judgment notwithstanding the verdict is the same as that governing directed verdicts.
O’Neil v. W.R. Grace & Co.,
. The Coast Guard required that ten men be stationed in the Engineering Department. On the day of the accident, fourteen men were working in that capacity on the NATALIE.
. Seven men were working in the engine room when the accident occurred. Six of the seven were subject to the authority of the second engineer, and the seventh, Sweet, testified that he had helped Thezan with the job of removing the door in the past and would have been available to assist on the day in question if he had been asked.
. Thezan relies heavily on a recent decision of this Court in
Comeaux v. T.L. James & Co., Inc.,
. The judge who presided over the trial was unavailable, and a second district judge responded to the jury’s questions.
. The instructions were as follows:
“The duty to provide a seaworthy vessel also includes a duty to supply an adequate and competent crew. Even though the vessel owner provides a numerically adequate crew, the vessel may still be unseaworthy if too few men are assigned to a given task.
If therefore you find that the owner of this vessel did not provide an adequate crew or sufficient manpower to perform the tasks required, or if you find that the vessel was in any manner unsafe or in any manner unfit, or if you find that too few men were assigned to a given task, then you may find that the vessel was unseaworthy and the shipowner liable, without any reference to the issue of negligence of the defendant or any of its employees.” (emphasis added).
. The amount of the maintenance to which an injured seaman is entitled is a question of fact, and will not be overturned unless clearly erroneous.
Caulfield v. AC & D Marine, Inc.,
