VANCE, Circuit Judge:

This case arises out of the authorities' seizure of over 750 kilograms of cocaine. Appellants were each convicted of one count of possession with intent to distribute cocaine in violation of 21 U.S.C. § 841(a)(1), and one count of conspiracy to commit that offense in violation of 21 U.S.C. § 846. Following their convictions all five appellants brought this appeal raising various points of error. We affirm.

I.

On the morning of October 30, 1985 a most peculiar series of events occurred on the grounds of "Montsorrel," a large oceanfront estate in Palm Beach. Shortly after sunrise Thomas Basile, the estate's caretaker, encountered three men walking on the property. The men were soaking wet and covered with sand. According to Basile the men "looked like they just came out of the ocean." After telling the men to get off the property Basile called the police.

When the police arrived they noticed an unoccupied three-seat ocean racer about fifty yards offshore. On the beach they observed various items, including a life jacket, swim fins, shoes and a locked canvas duffel bag that had been cut open. As one of the officers peered at the unoccupied boat through binoculars, he noticed another boat approaching from the south-east. As the boat drew closer the officers were able to see that it was occupied by two white males, one older than the other. When the boat had moved to within about thirty yards of the unoccupied vessel, the younger of the two men picked up a pair of binoculars and began to stare at the unoccupied vessel. Shortly thereafter the man trained his binoculars on the shoreline where uniformed officers were standing in plain view. Almost immediately the boat turned sharply and headed back toward the southeast at the high rate of speed. The officers on the scene contacted aerial units of the Palm Beach County Sheriff's office which proceeded to track and pursue the fleeing vessel.

At that point officers swam out to the unoccupied vessel and found thirty-two duffel bags containing more than 750 kilograms of cocaine. At about the same time three men fitting the description Basile had given police were being detained a short distance from the estate. The men had been "pretending" to jog down the road when they were stopped by police. After Basile arrived and positively identified the men, they were arrested and later identified as appellants Eyder Castellano, Anastasio Cervantes and Maximo Feijo-Garcia.

In the meantime the authorities had managed to stop the fleeing boat, which had sped about twenty-five miles at almost fifty miles an hour — its maximum speed. Manning the boat were appellants William and Michael Bennett. Upon being stopped William Bennett exclaimed, "I don't know why they stopped me. We were just going fishing." When authorities searched the boat, however, they found no fishing equipment. Instead they found a loaded handgun, an AR-15 semi-automatic rifle, plastic baggies and $110,790 in cash hidden in a panel in the boat's cabin.

The Bennetts were arrested and placed in a holding cell with other prisoners. Roger Furbee was one of those prisoners. Furbee testified that he and the Bennetts discussed cocaine. When Furbee told the Bennetts that he had been involved in cocaine transactions of four to eight hundred pounds, Michael Bennett stated, "That's not a lot of cocaine." In addition, William Bennett expressed concern over how he was going to explain that he was fishing with over $110,000 in his boat. According to Furbee, William Bennett told his son that the best thing they could say was that they were trying to render assistance to the other boat.

Back in Palm Beach Cervantes, Feijo-Garcia and Castellano were being questioned. Cervantes and Feijo-Garcia steadfastly maintained that they did not know anything about a boat, and that they had simply been "out for a stroll" when detained by police. Castellano, however, told a different story. He gave a full confession, describing how he, Cervantes and Feijo-Garcia had picked up the cocaine on an island. Castellano described the island in some detail and told of a mother ship with people working on it. Castellano also led authorities back to the estate and showed them where an additional twenty-nine kilograms of cocaine were hidden.

All five appellants were indicted on one count of possession with intent to distribute cocaine and one count of conspiracy. They were tried jointly, with Castellano's confession being introduced in evidence. Appellants were each convicted on both counts. This appeal followed.

II. A.

We first address the Bennetts' contentions. The Bennetts argue: (1) that the court erred in admitting evidence of William Bennett's prior drug smuggling activity, and (2) that the evidence was insufficient to support their convictions.

At trial the government introduced in evidence William Bennett's 1986 conviction for conspiracy to import and conspiracy to possess with intent to distribute methaqualone. The government introduced evidence that Bennett's role in the conspiracy had been to find an airstrip and assemble an offload crew. The government also introduced evidence of William Bennett's involvement in a 1980 scheme to import cocaine from the Bahamas. The Bennetts contend that this evidence was inadmissible under Rule 404(b) of the Federal Rules of Evidence and that any probative value it had was outweighed by the danger of unfair prejudice. We disagree.

The standard governing the admissibility of evidence of prior bad acts is well settled:

First, it must be determined that the extrinsic offense evidence is relevant to an issue other than the defendant's character. Second, the evidence must possess probative value that is not substantially outweighed by its undue prejudice. . . .

United States v. Nabors, 707 F.2d 1294, 1300 (11th Cir. 1983), cert. denied, 465 U.S. 1021, 104 S.Ct. 1271, 79 L.Ed.2d 677 (1984) ( quoting United States v. Beechum, 582 F.2d 898, 911 (5th Cir. 1978) (in banc), cert. denied, 440 U.S. 920, 99 S.Ct. 1244, 59 L.Ed.2d 472 (1979)); see Fed.R.Evid. 403, 404(b). The determination of whether extrinsic offense evidence meets this two-part test is a matter within the district court's discretion, and the court's decision to admit such evidence will not be upset on appeal absent an abuse of that discretion. United States v. Dothard, 666 F.2d 498, 501 (11th Cir. 1982).

At trial the Bennetts' defense was that they had simply taken their boat out to do some fishing and diving in the Bahamas or Florida Keys. They testified that the only reason they pulled up to the drug laden vessel was that they were concerned for the safety of anyone who might have been aboard. Seeing that the boat was unoccupied, they decided to leave.

Given the Bennetts' explanation of their activities, intent became the central issue in the case. The extrinsic offenses admitted in evidence both involved the intent to import and distribute illegal narcotics. The fact that William Bennett had engaged in narcotics smuggling on other occasions certainly makes it less likely that his intentions were innocent in this instance. Beechum, 582 F.2d at 911; see also United States v. Ospina, 823 F.2d 429, 433 (11th Cir. 1987), cert. denied, ___ U.S. ___, 108 S.Ct. 1232, 99 L.Ed.2d 432 (1988); United States v. Dorsey, 819 F.2d 1055, 1060 (11th Cir. 1987). Accordingly, the evidence of William Bennett's prior drug-related offenses was relevant to the issue of his intent. Because the evidence was relevant to intent, it was admissible under Rule 404(b).

Even if evidence of prior bad acts is relevant to an issue other than the defendant's character, it cannot be admitted if it is unduly prejudicial. Rule 403 allows a court to exclude otherwise relevant evidence if its probative value is substantially outweighed by the danger of unfair prejudice.

In this case the probative value of the extrinsic offense evidence was substantial. As we noted earlier, intent was the central issue in the case against the Bennetts. Because the government did not have overwhelming evidence connecting the Bennetts to the conspiracy, the extrinsic offense evidence was an important aspect of the government's case against William Bennett. The evidence was especially probative in light of the Bennetts' "mere presence" defense. In addition, the two prior offenses were quite similar to the one involved here. In both instances William Bennett had been involved in a scheme to import narcotics into the United States.

Turning to the other side of the Rule 403 balance, we cannot say that the extrinsic offense evidence presented a significant danger of unfair prejudice. The offenses involved were "`not of a heinous nature, likely to incite the jury to an irrational decision.'" United States v. Tunsil, 672 F.2d 879, 881 (11th Cir.), cert. denied, 459 U.S. 850, 103 S.Ct. 110, 74 L.Ed.2d 98 (1982) ( quoting United States v. McMahon), 592 F.2d 871, 876 (5th Cir.), cert. denied, 442 U.S. 921, 99 S.Ct. 2847, 61 L.Ed.2d 289 (1979)). In addition, the court twice instructed the jury that it should consider the evidence only for the limited purpose of establishing William Bennett's state of mind. We therefore conclude that the evidence of William Bennett's prior drug smuggling activity was admissible under Rule 403, and that the district court correctly admitted it.

The Bennetts also challenge the sufficiency of the evidence to support their convictions. We cannot reverse a conviction on this ground unless after reviewing the evidence in the light most favorable to the government we conclude that no reasonable trier of fact could find proof of guilt beyond a reasonable doubt. United States v. Montes-Cardenas, 746 F.2d 771, 778 (11th Cir. 1984). "The evidence may be sufficient though it does not `exclude every reasonable hypothesis of innocence or [is not] wholly inconsistent with every conclusion except that of guilt. . . .'" Id. ( quoting United States v. Bell, 678 F.2d 547, 549 (5th Cir. Unit B 1982) (in banc), aff'd on other grounds, 462 U.S. 356, 103 S.Ct. 2398, 76 L.Ed.2d 638 (1983)).

There was ample evidence to support the Bennetts' convictions. The Bennetts, riding in a boat loaded with weapons and over $110,000 in cash, pulled up near an unoccupied vessel containing over 750 kilograms of cocaine. Michael Bennett began to peer at the cocaine laden vessel through a pair of binoculars. After Michael Bennett turned the binoculars toward the shoreline where uniformed police officers were standing, the Bennetts' boat turned sharply and took off at a high rate of speed in the direction from which it had come. From this evidence, a jury might reasonably conclude that the Bennetts had come looking for the cocaine laden boat, only to be forced to flee by the presence of the authorities. This is especially true in light of the evidence of William Bennett's prior drug smuggling activities.

The government introduced other evidence tying the Bennetts to the conspiracy. Following the Bennetts' arrest, authorities searched William Bennett's home and found over fifty firearms, a triple balance beam scale, bulletproof vests, a scanner with a list of law enforcement frequencies and devices used to detect electronic surveillance. The fact that William Bennett owned these items casts substantial doubt on his assertion that he earned his living as a professional poker player. The testimony of several of William Bennett's neighbors was even more revealing. Three persons who either lived or worked near the Bennett residence testified that in the months before William Bennett's arrest they had seen him with a boat that resembled the cocaine laden vessel. Indeed, one witness positively identified the cocaine vessel as one he had seen docked by William Bennett's house. The witness saw the boat at least twice, and wondered "why . . . a boat of this size with three engines in the back [was] in this little lagoon."

Finally, the jury could have inferred guilt from the Bennetts' own explanations of their activities. When first stopped William Bennett stated that he was simply going fishing. An exhaustive search of the boat, however, turned up no fishing equipment. At trial both Michael and William Bennett testified that they had taken the boat out intending to go to the Bahamas or Florida Keys for "recreational" purposes. Although neither of the Bennetts had done any boating in those waters, no maritime charts or maps were found. Instead, authorities found an aeronautical map with signals for radio frequencies. As for the presence of $110,790 in cash, William Bennett testified that he was a professional gambler and that he kept the money hidden in the boat because its presence in the house might endanger his wife.

By choosing to present a defense the Bennetts incurred the risk that they might bolster the government's case. Indeed, this court has held that a defendant's implausible explanation may constitute positive evidence in support of a jury verdict. United States v. Eley, 723 F.2d 1522, 1525 (11th Cir. 1984). Here, the Bennetts' explanation of their activities was dubious, if not wholly incredible. A reasonable jury might well disbelieve the explanation and conclude that the Bennetts were lying in an attempt to cover up illegal activities.

We recognize that the evidence against Michael Bennett is not as compelling as that against his father. The evidence, however, was sufficient to support the jury's verdict. The boat the Bennetts were using when arrested was registered to Michael Bennett. It was Michael Bennett who was watching the cocaine laden vessel so closely through his binoculars. It was Michael Bennett who scoffed at Roger Furbee's assertion that he had been in cocaine transactions of four to eight hundred pounds and stated: "That's not a lot of cocaine." After considering this evidence along with the evidence outlined above, we conclude that there was ample evidence from which a reasonable jury might find both William and Michael Bennett guilty beyond a reasonable doubt.

B.

We now turn to the issues raised by Cervantes, Castellano and Feijo-Garcia. Of the four issues raised by these appellants, only two merit discussion: (1) whether the court violated Castellano's and Cervantes' statutory and constitutional rights by failing to supply individual interpreters, and (2) whether Castellano's confession was admitted in evidence in violation of Bruton v. United States, 391 U.S. 123, 88 S.Ct. 1620, 20 L.Ed.2d 476 (1968).

Cervantes, Castellano and Feijo-Garcia speak only Spanish. Although Feijo-Garcia's court appointed attorneys was fluent in Spanish, the attorneys appointed to represent Cervantes and Castellano were not. The court was aware of the appellants' inability to speak English and appointed a single interpreter to serve all three. The interpreter sat near the witness stand and provided translation by speaking into a microphone that fed into headsets worn by the three Hispanic defendants.

Cervantes and Castellano contend that the court erred by denying their request for individual interpreters. Although they admit that the translation provided by the single court-appointed interpreter enabled them to understand the proceedings, Cervantes and Castellano complain that the lack of individual interpreters prevented them from communicating with counsel during the course of the trial. They argue that the court's failure to appoint individual interpreters violated their rights under both the Court Interpreters Act, 28 U.S.C. § 1827-28, and the sixth amendment. We disagree.

The Court Interpreters Act was enacted in 1978 to require the federal courts to appoint interpreters in certain cases. The Act is triggered:

[I]f the presiding judicial officer determines on such officer's own motion or on the motion of a party that such party (including a defendant in a criminal case), or a witness who may present testimony in such action —

(1) speaks only or primarily a language other than the English language; or

(2) suffers from a hearing impairment (whether or not suffering also from a speech impairment)

so as to inhibit such party's comprehension of the proceedings or communication with counsel or the presiding judicial officer, or so as to inhibit such witness' comprehension of questions and the presentation of such testimony.

28 U.S.C. § 1827(d). Upon making such a determination the court must "utilize the services of the most available certified interpreter, or . . . the services of an otherwise competent interpreter." Id.

We conclude that the district court's appointment of a single interpreter satisfied the requirements of the Court Interpreters Act. The Act clearly authorizes the use of a single interpreter in multidefendant cases. Section 1828(a) directs the Administrative Office of the United States Courts to establish a program to "provide a capacity for simultaneous interpretation services in multidefendant criminal actions. . . ." The Act's legislative history is also revealing. The House Report states:

It is the committee's intent that all interpretations are to be made in the consecutive mode except in those limited situations where the court determines, and all the parties agree, that the simultaneous or summary mode will aid in the efficient administration of justice. The use of simultaneous interpretation is authorized to deal with two situations: first, in cases where the services of a manual (sign language) interpreter are to be utilized and, second, in multidefendant criminal . . . actions.

. . . .

Section 1828 of the bill authorizes the establishment of special interpretation services which shall be capable of providing simultaneous interpretation services in multidefendant criminal . . . actions.

H.R. Rep. No. 1687, 95th Cong., 2d Sess. 7-8, reprinted in 1978 U.S. Code Cong. Admin. News 4652, 4658-59 (emphasis added). Simply put, the method of translation used by the district court is the very method Congress envisioned in multidefendant cases when it passed the Court Interpreters Act.

Cervantes and Castellano had ample opportunity to consult with their attorneys. From the outset of the trial the court was sensitive to appellants' predicament and offered to recess the proceedings at any time they needed to consult their attorneys through the interpreter. Appellants requested and received several such recesses. Indeed, appellants conceded at oral argument that at no time did the court deny a request by appellants' counsel to recess the trial and use the interpreter to communicate with their clients.

In essence, the appellants' interpretation of the Court Interpreters Act would require the appointment of two interpreters for each non-English speaking defendant — one to translate the proceedings, and one to translate any communication between the defendant and his attorney. Nothing in the Act imposes such a requirement. The method of translation the district court employed enabled Cervantes and Castellano to both understand the proceedings and communicate with their attorneys. Accordingly, the requirements of the Court Interpreters Act were satisfied.

Nor did the court's use of a single interpreter violate Cervantes' and Castellano's rights under the sixth amendment. As a constitutional matter the appointment of interpreters is within the district court's discretion. See United States v. Tapia, 631 F.2d 1207, 1209 (5th Cir. 1980); United States v. Martinez, 616 F.2d 185, 188 (5th Cir. 1980), cert. denied, 450 U.S. 994, 101 S.Ct. 1694, 68 L.Ed.2d 193 (1981). Here, the court's use of the interpreter represented a proper balancing of appellants' "constitutional rights to confrontation and due process against the public's interest in the economical administration of criminal law." Martinez, 616 F.2d at 188.

Finally, we must determine whether the introduction of Castellano's confession constitutes reversible error under Bruton v. United States, 391 U.S. 123, 88 S.Ct. 1620, 20 L.Ed.2d 476 (1968). In Bruton the Supreme Court held that a defendant's sixth amendment right to confrontation is violated when the incriminating confession of a nontestifying codefendant is introduced at their joint trial, even if the court instructs the jury to consider the confession only against the codefendant. The Court questioned whether juries could follow such an instruction and concluded that the instruction was an insufficient substitute for a defendant's sixth amendment right of cross-examination. 391 U.S. at 132-37, 88 S.Ct. at 1625-29.

Cervantes and Feijo-Garcia contend that Castellano's confession was admitted in evidence in violation of Bruton. They argue that Castellano's confession directly implicated them as well, and that because Castellano was unavailable for cross-examination their sixth amendment right to confrontation was violated. Cervantes and Feijo also complain that the prosecutor urged the jury to accept Castellano's confession as evidence of their guilt during both his opening statement and closing argument.

At trial Castellano's confession was introduced through the testimony of Officer Muniz. The disputed portion of Officer Muniz's testimony is as follows:

Q: Did he tell you where he went to go to pick up the cocaine?

A: Yes. He didn't know the location but he described what the area looked like, and he described it as a rocky area with a lighthouse and a little house next to it, with a vessel parked in front at a dock.

. . . .

Q: What is that?

A: That is a drawing he made of the lighthouse with the little house next to it and on the other side is a picture of the vessel.

Q: The picture of which vessel?

A: The vessel where they unloaded the cocaine from.

. . . .

Q: Did he take you back to 548 North County Road to show you anything on the premises?

A: Yes, he did. He told me that there was cocaine hidden in some bushes and he took me back there, showed me where it was hidden.

Q: Did he tell you it had come off the boat?

A: The boat they were on, yes.

. . . .

Q: If you can, describe what you're doing there and on what's on the ground there.

A: That's where Mr. Castellano took me back to and that's kilos of cocaine they — blocks of cocaine which were hidden in the hedges.

(emphasis added).

During his opening statement the prosecutor had stated:

Who are these three guys? That's these three guys. These three guys are high-tailing it through the area and trying to get away. . . . Mr. Castellano concedes that he's got details about this, that he was involved in this transaction, and he brings police officers back to the area to show them where they had hidden and he had hidden 29 kilograms of cocaine that was taken from the vessel.

(emphasis added). During closing arguments the prosecutor again discussed Castellano's confession:

Castellano says something entirely different; and he tells us all about them going to pick the cocaine up[.]

(emphasis added). After a defense objection was overruled, the prosecutor returned to the same line of argument:

He tells the police officers about going out in this vessel picking up the cocaine from this mother vessel which is over near a lighthouse and then they brought the cocaine back in a speedboat and the speedboat broke down and they fled the area.

(emphasis added).

We agree with appellants that the manner in which the government introduced Castellano's confession was erroneous. Although the government attempted to redact the confession to omit all references to the other appellants, the use of the pronoun "they" could most logically be understood to refer to Cervantes and Feijo-Garcia. See United States v. Petit, 841 F.2d 1546, 1556 (11th Cir. 1988). This is especially true in light of the prosecutor's opening statement and closing argument. Because Castellano's confession clearly implicated Cervantes and Feijo-Garcia, its admission violated those two appellants' sixth amendment right of cross-examination.

Although the district court erred in its admission of Castellano's confession, it does not follow that appellants' convictions must be reversed. It is well settled that Bruton errors are subject to the harmless error rule of Chapman v. California, 386 U.S. 18, 87 S.Ct. 824, 17 L.Ed.2d 705 (1967). See Cruz v. New York, ___ U.S. ___, 107 S.Ct. 1714, 1719, 95 L.Ed.2d 162 (1987); Schneble v. Florida, 405 U.S. 427, 430, 92 S.Ct. 1056, 1058, 31 L.Ed.2d 340 (1972); Harrington v. California, 395 U.S. 250, 254, 89 S.Ct. 1726, 1728, 23 L.Ed.2d 284 (1969); Petit, 841 F.2d at 1556-57; United States v. Gutierrez-Chavez, 842 F.2d 77, 80-81 (5th Cir. 1988). As the Supreme Court explained in Schneble:

In some cases the properly admitted evidence of guilt is so overwhelming, and the prejudicial effect of the codefendant's admission is so insignificant by comparison, that it is clear beyond a reasonable doubt that the improper use of the admission was harmless error.

405 U.S. at 430, 92 S.Ct. at 1059.

The properly admitted evidence against Cervantes and Feijo-Garcia was nothing short of overwhelming. Indeed, there can be no doubt whatever that Cervantes, Feijo-Garcia and Castellano were the three men that had abandoned the cocaine laden vessel. Basile positively identified the trio as the three men he had seen walking on the estate a short distance from where the boat was found. When arrested all three men were soaking wet and covered with sand. Although they pretended to be jogging, Cervantes was in his bare feet and Castellano was running in socks only half on his feet. The address on Feijo-Garcia's driver's license matched the address of the cocaine vessel's registered owner. In addition, one week prior to appellants' arrest a United States Customs investigator had observed Castellano in possession of the boat. Finally, the jury heard testimony about how Castellano led authorities back to the estate and showed them where an additional twenty-nine kilograms of cocaine were hidden.

When viewed in light of the case's 1200 page record and the overwhelming evidence of appellants' guilt, the Bruton violation was insignificant. The error was regrettable, but we cannot imagine that it affected the jury's verdict. Accordingly, we conclude that the error was harmless under Chapman.

III.

None of the five appellants has demonstrated reversible error. Their convictions are therefore

AFFIRMED.