I can only assume that the central character in this film is called "The Jackal" in order to reel in a few more unsuspecting punters who might think that it had the subtleties and tension of "The Day Of The Jackal"!
We have a professional hit-man hired to assassinate someone ... and that's about as far as the similarities go. Different country, different target, different methods, different reason, different expert helper, different ending. You may as well claim that "Star Wars Episode I: The Phantom Menace" was a remake of Ben Hur because it contained a high-tech "chariot" race!
So, let's not make comparisons!
It would appear that someone decided that the only way to make this film exciting was to find the biggest, baddest gun available, and build the rest of the script around that. Bad move, as everything then became unbelievably contrived. The HUGE cannon is shipped to Canada rather than The States where it's going to be used (why?) and then has to be taken across The Great Lakes in a boat which is "hidden" in a scheduled regatta. The goodies figure this out, but ...
(a) fail to spot the one person sailing single-handedly (bit of a clue there boys! You know ... the LONE assassin! What were you actually looking for ... a boat with a lumping great gun strapped to the deck and a bloke wearing an "I am The Jackal" tee-shirt?)
(b) only looked at boats registered in Canada ... as surely the baddie wouldn't change the name on the boat! (Hello! Anyone in there???)
(c) took so long to get to the regatta themselves that The Jackal had already unloaded his HUGE cannon, carried it all the way down a narrow pontoon, and loaded it into his mini van ... in the middle of a regatta, presumably in broad daylight, otherwise, why was The Jackal still hanging around???
At this point, I was laughing so hard that I had to take a break!
It didn't get much better ...
Our ace, professional, world's number one assassin then sets up the cannon in his mini-van which is parked in line of sight of the target. (Clearly, when a person of that importance is making a public appearance, the police don't bother to check any mini-vans with blacked out windows if they have a parking permit ... especially when they're looking for a mini-van!!!) Cue the daftest, most hilarious part of the film! The Jackal (best in the game) has a video link via his mobile and laptop to the HUGE cannon so that he can aim and fire it remotely. Surely he will be miles away. Maybe in another country? No! He sits there on a park bench, not far from the HUGE cannon, in a police uniform, with a laptop on his knee! Why? Because he's either the stupidest assassin know to man, or maybe ... just maybe, it's so that Richard Gere can catch him! After all, when the HUGE cannon pumps round after round into a building, the only person to chase after the Jackal is Gere ... oh, apart from Gere's ex girlfriend who, conveniently, just happens to be in the area, toting a hand-gun!
Gimme a break!
Really just a one star film ... the second star is because I felt sorry for Sidney Poitier being misused in such tripe!