This was Gumotex’s take on Grabner’s Holiday boats, since developed by Incept (I’m pretty sure it’s in that order). In other words a twin sidebeam IK but with inflatable decking so making it an inflatable SinK (sit-in kayak). You didn’t get many of those to the pound back then, though Gumotex do the Swings and Framuras. The numbers for the single were 4.8m x 75cm and with 200 kilo payload.
In case you’re wondering, twin side beam – two smaller side tubes instead of one fat one – is a good idea. It makes the sides taller so less swamping, the interior space is greater and two side beams make the boat flex less longitudinally – a problem with all non-dropstitch IKs once they get beyond a certain length. The drawback might be that the boats are taller in the water, so are more wind-prone.
Once I thought a Seaker could fill the spaces where the Sunny did not shine, but at 34kg it was more than double the weight of a Sunny, Incept K40, Grabner H2, Amigo and my Seawave. Unusually, the Seaker was made from Mirasol, a high quality Korean PVC that’s clearly heavier than Nitrilon.
Like a proper sea kayak it had hatches and a rudder and could no doubt be rolled, but to me half the appeal of IKs, even at sea, is the SoT aspect. If you want to sit in and want to be portable, get a nice low-profile Feathercraft for nearly the same price, less weight and which looks less like a floating, wind-prone torpedo.
They also did a 2-seater Seaker II but I got the feeling these were exotic, rarely bought boats that were heavily discounted in North America before disappearing around 2014. It was the end of the line for the heavy Seakers which is a shame because the only thing wrong with them was the weight. Still, I have never actually seen one so what the heck do I know about Seakers? A blogger in Canada got one cheap a few years ago but didn’t keep it.