We confront the constitutional limits of our extraterritorial jurisdiction in yet another major drug-smuggling operation on the waters of the eastern Pacific Ocean. Anatoli Zakharov appeals his jury conviction for (1) conspiracy to possess over 9200 kilograms of cocaine with intent to distribute on board a vessel, and (2) possession of cocaine with intent to distribute on board a vessel. He challenges the amended Maritime Drug Law Enforcement Act (“MDLEA”), codified at 46 U.S.C. app. §§ 1901-1904, as unconstitutional on the grounds that Congress removed jurisdiction from the enumerated elements of the maritime drug-smuggling offense that must be decided by a jury beyond a reasonable doubt. He also challenges the district court’s failure to suppress evidence of his confession and the sufficiency of evidence supporting his convictions.
We have jurisdiction pursuant to 28 U.S.C. § 1291 and affirm Zakharov’s convictions. First, the MDLEA is constitutional as applied to Zakharov. Facts underlying statutory jurisdiction were not contested, and determination of constitutional nexus jurisdiction is properly within the province of the court, not the jury. Second, we find the evidence sufficient to establish the required nexus between the United States and the defendant’s drug-smuggling activities. Third, the district court properly determined that Zakharov’s confession should not be suppressed because the Fourth Amendment does not apply to non-resident aliens outside of the United States. Fourth, the eleven-day delay in bringing Zakharov before a magistrate judge was not unreasonable under Federal Rule of Criminal Procedure 5(a) in light of the time necessary to transport him by sea to the United States. Finally, evidence of Zakharov’s confession was properly admitted, and sufficient evidence existed to allow any rational trier of fact to find him guilty beyond a reasonable doubt. We uphold the convictions.
But, because we cannot reliably determine from the record “whether the sentence imposed would have been materially different had the district court known that the[federal] sentencing guidelines were advisory,”
United States v. Ameline,
I
Zakharov was a crew member aboard the Svesda Man, a fishing vessel registered in the country of Belize. On April 28, 2001, the vessel was 500 miles off the coast of southern Mexico in international waters when it was spotted by the crew of the USS Rodney M. Davis, a United States Navy frigate performing drug interdiction and maritime patrol duties in cooperation with the United States Coast Guard. A seven-member Coast Guard Law Enforcement Detachment (“boarding team”) deployed from the Davis in a small boat and attempted to make contact with the Svesda Man. The boarding team observed that the Svesda Man was flying the Belizean flag. When the Svesda Man did not respond after she was hailed by the Navy frigate, the Coast Guard team boarded the Svesda Man and conducted a four-day search of the vessel including a “space accountability search.” The Davis’s boarding team was relieved by a second Coast Guard crew on the fifth day of the search. The second crew discovered more than 9200 kilograms of cocaine *1175 cleverly secreted in an area behind a fuel tank of the vessel. 1
Following discovery of the cocaine, the Coast Guard seized the Svesda Maru pursuant to our bilateral treaty with Belize and with the express permission of the Belizean government. The Svesda Maru’s crew, all Russians and Ukrainians, were taken into custody aboard the Coast Guard Cutter Active. They were kept together on the deck of the cutter for the ten days it took to reach San Diego, California. None of the Svesda Mam crewmen was interrogated while on board the Coast Guard ship.
The cutter arrived in San Diego on May 13, 2001. Prior to Zakharov’s initial appearance before a magistrate judge, an agent of the United States Drug Enforcement Administration (“DEA”) interviewed him through a Russian interpreter. The agent advised Zakharov of his constitutional rights, and Zakharov signed a Russian-language Miranda waiver. The interview lasted approximately one and one-half to two hours. The agent testified that Zak-harov initially denied knowledge of the cocaine but was eventually persuaded to talk. Zakharov then admitted that he was to be paid $20,000 for the trip and that he and the crew knew that the vessel contained cocaine, but he claimed that only the captain knew all of the details of the voyage. He also claimed that this was his first experience smuggling cocaine.
Later that day, a federal magistrate judge found probable cause to support the complaint against Zakharov. Zakharov’s initial appearance in court was on the following day. The magistrate ordered his detention without bail. Zakharov was indicted on May 24, 2001, and he pled not guilty to one count of conspiracy to possess cocaine with intent to distribute aboard a vessel and one count of possession of cocaine with intent to distribute aboard a vessel, in violation of the MDLEA, 46 U.S.C. app. § 1903(a), (c)(1)(C), (f) & (j), and 18 U.S.C. § 2. In November 2002, a jury in the Southern District of California convicted Zakharov on both counts. He was sentenced to 240 months in custody to be followed by five years of supervised release.
II
Zakharov first argues that the district court lacked jurisdiction to adjudicate his claims under the MDLEA. He claims that (1) the district court erred in failing to submit facts necessary to establish jurisdiction to the jury, and (2) the government failed to present sufficient evidence to establish a nexus between the United States and the seized cocaine.
The MDLEA prohibits drug smuggling activity by “any person on board a vessel of the United States, or on board a vessel subject to the jurisdiction of the United States, or who is a citizen of the United States or a resident alien of the United States on board any vessel.” 46 U.S.C. app. § 1903(a). The statute provides:
*1176
Id.
§ 1903(f). In
United States v. Klimavicius-Viloria,
*1175 Jurisdiction of the United States with respect to vessels subject to this chapter is not an element of any offense. All jurisdictional issues arising under this chapter are preliminary questions of law to be determined solely by the trial judge.
*1176
Zakharov argues that § 1903(f) violates the Fifth and Sixth Amendments of the United States Constitution and the requirement of
Apprendi v. New Jersey,
In
Perlaza
we made clear that, notwithstanding § 1903(f), contested facts underlying the existence of statutory jurisdiction must be resolved by a jury.
2
Perlaza,
Moreover, there is no factual question pertaining to statutory jurisdiction for the jury to decide. There is no dispute for purposes of § 1903 that the district court possessed statutory jurisdiction in the instant action: the Svesda Maru was a Belizean-flagged vessel registered in Belize, and the Coast Guard received consent to enforce United States law aboard her both expressly from the Belizean government and pursuant to our bilateral treaty with Belize. 3 See. id.-at 1168; 46 U.S.C. app. § 1903(c)(1)(C) (extending statutory jurisdiction to “a vessel registered in a foreign nation where the flag nation has consented *1177 or waived objection to the enforcement of United States law by the United States”).
Unlike statutory jurisdiction, the constitutional nexus requirement is not an express element of the crime but is “a judicial gloss applied to ensure that a defendant is not improperly haled before a court for trial.”
Klimavicius-Viloria,
In this context, MDLEA § 1903(f) merely codified this court’s longstanding rule that the constitutional nexus inquiry is a matter for the court’s determination.
See id.; Moreno-Morillo,
The next question is whether the district court properly determined that the evidence sufficed to establish a nexus between the United States and Zakharov’s activities.
See Klimavicius-Viloria,
Here, extensive evidentiary hearings were held to determine whether sufficient nexus with the United States existed to establish jurisdiction. The district court determined by a preponderance of the evidence that the shipment of cocaine was likely to have effects in the United States. The court found that (1) four of the twelve markings on the cocaine bundles were found previously in the United States; (2) based on the type of vessel, its location, and the kinds of navigational charts on the vessel, the cocaine was destined for the United States; and (3) it was unlikely that Russia or Europe was the intended destination for the cocaine. The district court based the last two findings on its determination that the testimony of Zakharov’s expert witness, a former DEA agent, was not as credible or persuasive as that of the government’s expert, a DEA strategic intelligence analyst with over eighteen years of experience.
See Spain v. Rushen,
Zakharov makes very specific evidentia-ry challenges to the district court’s findings and questions its credibility determination. Zakharov suggests that, because the government’s expert testified that Russia also has a drug trafficking market and that Europe was a possible market, it was erroneous for the district court to believe that the United States was the likely destination for the drugs. But many of the statements on which Zakharov relies could support either witness’s conclusion.
6
In essence, Zakharov’s claim constitutes no more than an argument that it would have been reasonable for the district court to believe his expert witness instead of the expert witness for the United States. Zakharov’s argument does not create “a definite and firm conviction that a mistake has been committed” by the district court in its credibility and factual findings.
Silva v. Woodford,
Next, we must determine whether these facts support a finding that the drug shipment would likely have had effects in the United States. The only significant distinction between the facts establishing nexus in
Klimavicius-Viloria
and those in the instant case is that here there are fewer cocaine bundle markings that match bundles found previously in the United States.
*1179
We considered matching markings to be “[t]he most persuasive evidence” in
Kli-mavicius-Viloria.
The connection is not as substantial here. Only four of the twelve markings had been found previously in the United States. Three of the matches may have been particularly significant, however, because they were found on cocaine packages in the United States roughly contemporaneously with the seizure of the Svesda Mam.
In any event, the location of the vessel, the large amount of cocaine, the types of navigational charts on board, and the existence of some matching logos are sufficient indicators of nexus for the exercise of United States jurisdiction to “not be arbitrary or fundamentally unfair.”
See id.
at 1256 (citing
Davis,
Ill
Zakharov contends that evidence of his statements made upon arrival in San Diego should be suppressed because there was undue delay in determining probable cause in violation of the Fourth Amendment and in bringing Zakharov before a magistrate judge in violation of Federal Rule of Criminal Procedure 5(a). We review de novo a district court’s denial of a motion to suppress evidence, but the factual findings underlying the ruling are reviewed for clear error.
United States v. Fernandez-Castillo,
Zakharov claims that the United States’ failure to utilize helicopters, radios, fax machines, and other technology to obtain a probable cause determination before he was physically present in the United States constituted undue delay under the Fourth Amendment. The district court summarily held that Zakharov could not “prevail on the Fourth Amendment claim because the Fourth Amendment does not apply to aliens outside United States territory.” In support the court cited
United States v. Verdugo-Urquidez,
This holding forecloses Zakharov’s claim. Here, the alleged unconstitutional delay took place outside of the United States in international waters, and there is no suggestion that Zakharov had any substantial connection to this country.
See United States v. Borona,
We also hold that Zakharov’s claim pursuant to Federal Rule of Criminal Procedure 5(a) is without merit. At the time of Zakharov’s arrest, Rule 5(a) provided that “any person making an arrest without a warrant shall take the arrested person without unnecessary delay before the nearest available federal magistrate judge.” Fed.R.Crim.P. 5(a) (2001). The district court held the delay justified by the need to transport Zakharov 1620 nautical miles to the United States. The district court found that “[w]ith the Svesda Maru in tow, the ships proceeded to the nearest United States port, San Diego, and made no stops along the way.” A federal magistrate judge found probable cause to support the complaint filed against Zakha-rov the day that he arrived in San Diego. The district court’s finding that Zakharov was presented to the magistrate without unnecessary delay was not clearly erroneous, and we affirm its ruling.
IV
Zakharov asserts that the government failed to present sufficient evidence to sustain his convictions. We review de novo the district court’s denial of a motion for acquittal under Federal Rule of Criminal Procedure 29.
United States v. Johnson,
“To prove a conviction for conspiracy, the government must establish that [the defendant] ‘had knowledge of the conspiracy and acted in furtherance of it.’ ”
United States v. Messer,
Conviction for the underlying substantive crime of possession of cocaine with intent to distribute aboard a vessel may be based on aider and abettor liability.
Klimavicius-Viloria,
a long voyage on a small vessel evincing a close relationship between captain and crew; suspicious behavior or diversionary maneuvers before apprehension; attempts to flee; inculpatory statements made after apprehension; witnessed participation as a crewman; obviousness of the contraband; or absence of equipment necessary to the intended use of the vessel.
Perlaza,
Zakharov’s convictions are clearly supported by sufficient evidence. Two DEA agents testified as to Zakharov’s statement that he was aware of the cocaine, that the entire crew had knowledge of the cocaine, and that they were to be
*1181
paid $20,000 each for the voyage. This testimony, supported by the circumstantial evidence surrounding the seizure of cocaine on the
Svesda Maru
and other similar seizures, is sufficient to establish that a major drug-smuggling conspiracy existed and to show specific intent and knowing participation. Specifically, Zakharov was working on a fishing boat when it was readily apparent that the fishing vessel was not doing much fishing.
7
See Perlaza,
V
Zakharov argues that the district court erred in determining his ineligibility for a minor role adjustment or for relief under the safety valve provision pursuant to 18 U.S.C. § 3553(f). We review both of these factual determinations for clear error.
United States v. Rodriquez-Cruz,
The district court denied Zakharov’s request for a minor role adjustment because the offense involved a large quantity of drugs. We hold that the district court’s denial of the minor role adjustment was not clearly erroneous. The court reasonably concluded that persons assisting in the transportation of such a large quantity of cocaine generally do not play a minor role, particularly when the drugs are transported by sea.
See United States v. Murillo,
The district court similarly determined that Zakharov was not entitled to relief under the safety valve provision. The court explained that Zakharov did not sufficiently cooperate with the government and therefore failed to carry his burden that he told the government everything he knew about the offense pursuant to 18 U.S.C. § 3553(f)(5). Again, the court’s denial of Zakharov’s request for leniency was not clearly erroneous.
See United States v. Arrington,
We also note that the district court’s finding that Zakharov did not cooperate with the government, and was therefore ineligible for a reduced sentence under 18 U.S.C. § 3553(f), did not violate Zakharov’s Sixth Amendment rights.
See United States v. Labrada-Bustamante,
VI
The MDLEA is constitutional as applied to Zakharov and did not change our longstanding rule that the constitutional nexus inquiry is a matter for the district court’s determination. The district court did not err in finding a sufficient nexus between the United States and Zakharov’s drug-smuggling activities. Therefore, its exercise of jurisdiction over Zakharov comported with all due process requirements. Furthermore, the district court properly denied Zakharov’s motion to suppress evidence of his confession, and sufficient evidence existed to support his convictions. We affirm Zakharov’s convictions and grant a limited remand to permit the district court to reconsider the sentence pursuant to Ameline.
Conviction AFFIRMED; sentence REMANDED.
Notes
. This turned out to be one of the largest cocaine seizures in United States maritime history. See Press Release, Office of National Drug Control Policy, White House Drug Policy Office and Coast Guard Announce All— Time Record Annual Maritime Cocaine Seizures (Oct. 5, 2001), available at http://www. whitehousedrugpolicy.gov/NEWS/press01/ 100501.html.
.
Perlaza's
holding that a jury must resolve contested jurisdictional issues was limited to the context of statutory jurisdiction. We indicated that constitutional nexus jurisdiction is still an issue for the court’s determination.
Perlaza,
. The district court "preliminarily” found statutory jurisdiction to be proper. Because it believed statutory jurisdiction to be an element of an offense under
United States v. Smith,
. We do not require nexus for stateless vessels.
See Perlaza,
. The First and Fifth Circuits have rejected the position that nexus is required for foreign vessels when the flag nation has consented to the application of United States law to the defendants.
See United States v. Bustos-Useche,
The Third Circuit has rejected the proposition that nexus is required without expressly distinguishing between stateless and foreign vessels.
See United States v. Martinez-Hidalgo,
. For example, Zakharov points out that the government's expert testified that, “between 1998-2000, the number of seizures of cocaine had increased over 100% in the Eastern Pacific (where the Svesda Maru was seized) and that cocaine seizures in the Caribbean had decreased while seizures at the United States/Mexico border had decreased.” This fact could show that more shipments were going to places other than the United States. However, it could just as reasonably suggest that smugglers were attempting more sea-based imports into the United States and fewer land-based attempts along the border.
. The boarding team noted that (1) the bait aboard the ship was frozen solid and "appeared to have been there for quite a long time;” (2) there were only about twelve fish on board of the size that would normally be caught by professional fishermen; (3) the amount of fish on board was inconsistent with the time that the vessel had been underway; and (4) the large fish were frozen and in a decomposing state.
