in all fairness, reed vessels, (ie, kon-tiki) could be built without metal tools...
though this does raise one important question...
which species of dinosaur was intelligent enough to build boats capable of crossing oceans?
All of them? all the species were in fact intelligent, built boats and houses and little donsaurhenges, and were rather annoyed because the T-Rexes from over the other side of the river went and ate uncle Bob last week?
or just one species? which one?
Velociraptors? ok, so small, fast chicken-sized hunter-killers might've been able to float on a raft.... but they're only found in mongolia.
The dinosaurs which have been found on multiple continents are, strangely enough, late Jurassic period when, if you follow a round earth theory of continental drift, north america and europe were connected...
and they're things like Allosaurs. or Stegosaurs.... 2-5 tons of hulking great big reptiles... all these species were jumping on to boats for pleasure cruises? perhaps the allosaurs were herding stegosaurs as cattle for food?
sounds a little absurd, I'd have said.
what is notable is that once the continents split apart, in the cretacious period, the north american dinosaurs become... well, north american. and not found elsewhere. almost like the dinosaurs were... well, unable to cross oceans.
I wonder why? did they all forget to make boats then?
but, what I can say with certainty is that a viking era knarr can transport about 5 tonnes of cargo, and maybe half a dozen people. the scant archaeological remains in canada's l'anse aux meadows archaeological site are the oldest known transoceanic crossing, so the knarr is a good baseline of what's needed... its clinker-built construction is impossible without metal tools; incredibly difficult without iron tools, from augurs to bore holes, adzes to shape timbers, and two-man ripsaws and wedges to split and open logs to form planks, and axes to fell timber in the first place. its construction requires the abilty to create ropes, used both for rigging, and, soaked in pitch (and that's before you factor in the distillation and procesing of pine bark to form turpentine which in turn needs the pitch with resin to waterproof such a vessel, and the weaving and similar work required to produce sails...), to seal the keel to the clinker hull. such a ship takes hundreds of man-hours to construct... and, for something the size of a sauropod known to have been found on different continents, is akin to a duck-pond rowing boat.
the sheer logistical scale of a vessel needed to traverse an ocean by creatures of such size is spectacular. and yet, in the last two centuries of paleontology, not one single object has been found that suggests an advanced tool-using technology... no shells, drilled for beads, no flakes of stone napped to an edge, no bones with the marks of having been skinned by tool-users. nothing. and yet this is an intelligent, tool-using culture which must've created bloomerys for the production of metal tools, created axe-heads, bored holes in stones to make weights for looms to weave cord that became rope.....
and yet not one such artefact of even the simplest tribal intelligence has been found