Plaintiff, United States, sued to collect penalties of $1500 assessed pursuant to 46 U.S.C.A. § 398 against the defendant, Gahagan Dredging Corporation. The complaint as amended alleged that the defendant was the owner of three barges (the Barge Bernie Harris and the Barges 100 and 101) which the defendant permitted to be navigated on the high seas during the period “of about March 10-27, 1956,” without first having obtained the certificate of inspection required for seagoing barges, provided for by ch. 212, § 10, 35 Stat. 428 (1908) as amended by 60 Stat. 1097 (1946) 1 (hereinafter referred to as § 10); and that the defendant thereupon became liable for a penalty of $500 under 46 U.S.C.A. § 398 as to each of the said barges. The defendant entered a general denial, and for a separate defense challenged the Government’s complaint as failing to state facts upon which relief could be granted.
The district judge found that the three vessels were “seagoing barges” within the meaning of § 10, that they had traversed the high seas, and that the penalties were properly assessed. The Government was granted judgment. Defendant appeals. Its sole argument is that the judge below erred when he determined that the three vessels were “seagoing barges.”
Section 10 (46 U.S.C.A. § 395, 1952 ed. U.S.Code) provides:
“Seagoing barges; certificates.
“The Coast Guard shall at least once in every year inspect the hull and equipment of every seagoing barge of one hundred gross tons or over, and shall satisfy itself that such barge is of a structure suitable for the service in which she is to be employed, has suitable accommodations for the crew, and is in a condition to warrant the belief that she may be used in navigation with safety to life. It shall then issue a certificate of inspection in the manner and for the purposes prescribed in sections 399 and 400 of this title.”
It appears that the Barge Bernie Harris was actually a dredge, i. e., a barge containing equipment to be used in dredging operations. The parties stipulated the following as fact: That the Dredge Bernie Harris and the Barges 100 and 101 were not and never had been regularly employed as seagoing barges; that the three vessels were not regularly employed in navigation as seagoing barges; that any seagoing voyages made by any of the three were made only on rare occasions; that the design and construction of the three vessels was not such as to make them fitted for use on the sea or ocean; that the three were not heavily constructed to withstand weather and water in the heavy sea; and that at the time the alleged violations occurred no certificates of inspection required for seagoing barges had been obtained for any of the three vessels.
*641We are of the opinion that the court below properly determined that the term “seagoing barge” encompassed each of plaintiff’s three vessels.
The position taken by the Coast Guard is that a “seagoing barge” is any barge that goes to sea. This position is exemplified by its Merchant Marine Safety Instruction No. 1-56 issued on January 5, 1956, some three months before the defendant’s violations, which provided in pertinent part as follows:
“3. Action.
******
“b. Domestic voyages:
“(1) Inspection and certification. When nonself-propelled inland dredges, barges, etc., of 100 gross tons or over are being moved by sea between two domestic ports, they shall be inspected and certified as seagoing barges. A drydoek examination shall be required prior to the issuance of the certificate of inspection.”
The instruction indicated the intention of the Coast Guard thenceforth consistently to inspect vessels like the three here under the authority of § 10 even if such inspections had not previously consistently been pursued.2 This was a reasonable interpretation of the somewhat ambiguous language in a statute designed for the protection of life and property by the agency charged with the enforcement of the policy of that statute.3 The agency interpretation should not be casually disregarded.4
Section 10 requires the Coast Guard to satisfy itself that a seagoing barge is in such condition “that she may be used in navigation with safety to life.” We interpret the quoted language to mean that the Coast Guard’s duty is to protect lives that might be endangered by the unseaworthiness of the vessels required to be inspected.5 In the present case this duty is owed not only to persons aboard the towing vessel or on the barges, but also to persons on vessels that might collide with the uninspected vessels while afloat, or with their hulks should they sink.
Although not specifically mentioned in the section, it is reasonable to presume *642that Congress intended that not only -life but property, too, was to be preserved by the inspection requirement. The dangers which § 10 guards against exist on a barge’s first voyage to sea and on all subsequent ones whether the voyages are rare or frequent. A requirement that every barge over 100 gross tons be inspected before being utilized in “seagoing” trips insures that the policy Congress enunciated will be thoroughly enforced.6 See City of Los Angeles v. United Dredging Co., 9 Cir., 1926, 14 F.2d 364.
Appellant, relying on the fact that the Barge Bernie Harris, a dredge vessel, has always been unseaworthy, advances this fact as conclusive proof that it is not a “seagoing barge.” Appellant then argues that even though it may cause the vessel to journey between domestic ports by traversing the open sea the vessel is not required to be inspected or certificated as a “seagoing barge.” To adopt this argument would be to contradict completely the clear policy Congress enunciated in § 10. Appellant also relies on Commonwealth v. Breakwater Co., 1913, 214 Mass. 10, 100 N.E. 1034, where the Massachusetts court, after declaring that the original 1908 Act had been designed to protect those at sea, reversed a lower court determination that as a matter of law the statutory phrase “seagoing barge” meant any barge that went to sea, and remanded the case on the ground that whether the particular barge was a “seagoing barge” was a question of fact for the jury. Appellant’s reliance is misplaced, for even if we were to agree that such questions are for the trier of fact, Judge Clancy found it to be a fact that the three barges were “seagoing barges,” and this finding is not “clearly erroneous.” Fed.R.Civ.P. 52(a), 28 U.S.C.A. However, we think it is clear that the issue before us is that of interpretation of ambiguous statutory language, and such an issue is determinable by the court. Achilli v. United States, 1957, 353 U.S. 373, 77 S.Ct. 995, 1 L.Ed.2d 918; Vermilya-Brown Co. v. Connell, 1949, 335 U.S. 377, 386-390, 69 S.Ct. 140, 93 L.Ed. 76; N. L. R. B. v. Hearst Publications, 1944, 322 U.S. 111, 131, 64 S.Ct. 851, 88 L.Ed. 1170; Norton v. Warner Co., 1944, 321 U.S. 565, 569, 64 S.Ct. 747, 88 L.Ed. 430; Corn Products Refining Co. v. Benson, 2 Cir., 1956, 232 F.2d 554. Insofar as Commonwealth v. Breakwater Co. is contrary to this holding we think it error.
The judgment below is affirmed.