delivered the opinion of the court.

Asking for instruction, the .court below has sent up the following certificate and questions. Judicial Code, § 239.

“ This cause came to the Circuit Cijmrt of Appeals for the Ninth Circuit upоn an appeal from the United States District Court of Oregon from a judgment in favor of the appellee as libelant in that court, and against the appellаnt as libelee in that court* ior the sum of $10,000. The cause was a libel in admiralty for damages fot injury sustained. '

“ Libelant, Herman F. Rohde, received injury while at work on a partially completed vessel lying at a dock in the Willamette River forming a part of the shipbuilding plant of respondent, Grant Smith-Porter Ship Company. The character оf the work being done by libelant and the *474 operations of respondent of which the work formed a part are as follows: Respondent, Grant Smith-Porter Ship Company, at and prior to the time of libelant’s injury was engaged in constructing steam vessels for the-United States government under contract' with United States Shipping Board Emergency Fleet Corporation. One of these steam vessels was the steamer ‘Ahala.’ Prior to the time of libelant’s injury this steamer had been launched in the Willamette River аt Portland, Oregon, which river is a ‍​‌‌​‌​​‌‌​‌‌​​​‌‌​‌‌​‌​​​‌‌‌‌​​‌​‌‌​‌​​‌​‌​​‌​​‌‍part of the navigable waters of the United States. At the time of libelant’s injury, April 10, 1919, the vessel had been substantially completed, but was not reаdy for delivery and all of the work in process at the time of libelantes injury was work pertaining to the construction of the vessel by respondent, Grant Smith-Porter Ship Company. Libelant’s work was that of a carpenter or joiner and at the time of the injury he was at work constructing a bulkhead enclosing certain tanks in the vessel.

“ Libelаnt began, this proceeding in personam against respondent in the District Court of the United States for the District of Oregon sitting in admiralty. Negligence of the employer, rеspondent Grant Smith-Porter Ship Company, in the construction and maintenance of a.scaffold is alleged as the ground for recovering of damages.

¿ “At and prior to the time of libelant’s injury, there was in effect the so-called ‘.Workmen’s Compensation Law ’ of the State of Oregon (Chapter, 112, Laws of Oregon, 1913, as amended Chapter 271 Laws of 1915, and Chapter 288 Laws of 1917). The law applied to hazardous occupations (including shipbuilding) within the State of Oregon. .. An option is given both to employers and workmen to accept the compensation law or to reject it; that is,both employers and workmen are required to notify the proper statе authority if it,is desired not to come under-the act. Without such notice, the law is applicable and payments are required to be made by the employer, whiсh *475 payments include deductions from the wages of workmen. Workmen who thus come under the act are entitled to receive certain specified payments in the event of injury, and the act provides (Section 12): ‘And'the right to receive such sum or sums shall be in lieu of all claims against his employer on account of such injury or dеath, except as hereinafter specially provided.’

“At and prior'to the time of libelant’s injury, respondent was engaged in shipbuilding operations on the Willamеtte River at Portland within the State of Oregon; and libelant was in its employ as a carpenter or joiner in such shipbuilding operations. Prior to the time of the injury, neither respondent, the employer, nor libelant, the workman, had- notified the appropriate state authority of any rejection of the provisions of the Workmеn’s Compensation Act, and up to the time of the injury, respondent, the employer, ‍​‌‌​‌​​‌‌​‌‌​​​‌‌​‌‌​‌​​​‌‌‌‌​​‌​‌‌​‌​​‌​‌​​‌​​‌‍had taken all' the steps required by the compensation act to bring the work under its provisions; and there had been deducted and paid over to the commission administering the compensation fund payments from wages earned and paid libelant, the workman, up to the time of the injury. Payroll deductions from the wages of libelant and other workmen were made without regard to whether or not the work done by such workman was on vessels under construction on the ways or vessels under construction after launching.

“ Questions of law concerning which the Circuit Court of Appeals оf the Ninth Circuit desires the instruction of the Supreme Court are: 1. Is there jurisdiction in admiralty because the alleged tort occurred on navigable waters? 2. Is libelant entitlеd because of his injury to proceed in admiralty against respondent for the damages suffered? ”

The contract for constructing “The Ahala” was non-maritime, and аlthough the incompleted structure upon which the accident occurred was lying in navigable waters,’ *476 neither Rohde’s general employment, nor his activities at thе time had any direct relation to navigation or commerce. Thames Towboat Co. v. The Schooner. “Francis McDonald,” 254 U. S. 242. The injury was suffered within a State whose positive enactment prescribed an exclusive remedy therefor. And as both parties had accepted and proceeded under the statute by making ‍​‌‌​‌​​‌‌​‌‌​​​‌‌​‌‌​‌​​​‌‌‌‌​​‌​‌‌​‌​​‌​‌​​‌​​‌‍payments to the Industrial Accident Fund it cannot properly be said that they consciously contracted with each other in contemplation of the general system of maritime law. Union Fish Co. v. Erickson, 248 U. S. 308. Under such circumstances regulation оf the rights, obligations and consequent liabilities of the parties, as between themselves* by a local rule would not necessarily work material prejudice to any characteristic feature of the general maritime, law, or interfere with the proper harmony or uniformity of that law in its international or interstate relatiоns. Southern Pacific Co. v. Jensen, 244 U. S. 205; Western Fuel Co. v. Garia, ante, 233.

The general doctrine that in contract matters admiralty jurisdiction depends upon the nature of the transaction and in tort matters upon the locality, has bеen so frequently asserted by this court that it must now be treated as settled. Waring v. Clarke, 5 How. 441, 459; Philadelphia, Wilmington & Baltimore R. R. Co. v. Philadelphia Towboat Co., 23 How. 209, 215; The Propeller Commerce, 1 Black, 574, 579; The Plymouth, 3 Wall. 20, 33; Leathers v. Blessing, 105 U. S. 626, 630; Martin v. West, 222 U. S. 191, 197. See Atlantic Transport Co. v. Imbrovek, 234 U. S. 52, 59; and Hughes on Admiralty, 2d ed., p. 195.

The Workmen’s Compensation Law of Oregon declares that when a workman subject to its terms is áceidently injured in the course of his employment he “ shall. be entitled to receive from the Industrial Accident Fund *477 hereby created the sum or sums hereinafter specifiеd and the right to receive such sum or sums ‍​‌‌​‌​​‌‌​‌‌​​​‌‌​‌‌​‌​​​‌‌‌‌​​‌​‌‌​‌​​‌​‌​​‌​​‌‍shall be in lieu of all claims against his employer on account of such injury or death ...”

In Western Fuel Co. v. Garcia, supra, we recently pointed out that, as to certain local matters regulation of/ which would work no material prejudice to the general maritime law, the rules of the latter might be modified or supplemented by state statutes. The present case is controlled by that principle. The statute of the State applies and defines the rights and liabilities of the partiеs. The employee may assert his claim against the Industrial Accident Fund to which both he and the employer have contributed as provided by the statute, but he can not recover damages in an admiralty court.

This conclusion accords with Southern Pacific Co. v. Jensen, 244 U. S. 205; Chelentis v. Luckenbach S. S. Co., 247 U. S. 372; Union Fish Co. v. Erickson, 248 U. S. 308; and Knickerbocker Ice Co. v. Stewart, 253 U. S. 149. In each of them the employment or contract was maritime in nature and the rights and liabilities of the* parties werе prescribed by general rules of maritime law essential to its proper harmony and uniformity. Here the parties contracted with reference to the state statute; their rights and liabilities had no direct relation -to navigation, and. the application of the local law cannot materially affect any rules of the sea whose uniformity is essential.

As pointed out in The Ira M. Hedges, 218 U. S. 264, 270, “there sometimes is difficulty in distinguishing between matters going to the jurisdiction and those determining the merits.” The certified questions are not wholly free frоm uncertainty of that nature and we therefore state our view of their real intendment.

Construing the first question as meaning to inquire whether ‍​‌‌​‌​​‌‌​‌‌​​​‌‌​‌‌​‌​​​‌‌‌‌​​‌​‌‌​‌​​‌​‌​​‌​​‌‍the general admiralty jurisdiction extends to a *478 proceeding to recover damages resulting from a tort committed on a vessel in process of construction when' lying on navigable waters within a State, we answer, yes.

Assuming that the second question presents the inquiry whether in the circumstances stated the exclusive features of the Oregon Workmen’s Compensatiоn Act would apply and abrogate the right to recover damages in an admiralty court which otherwise would exist, we also answer, yes.