I would say yes. Navtex doesn't change, it's old technology and the Nav 4 probably only differs from the modern ones in the interfacing and filtering user-friendliness.
Might be worth checking to see if the Nav4 receives the 490kHz stuff in addition to 518 though. The newer ones do and its quite good.
Navtex is a very worthwhile addition to any boat. You got your weather forecast / gale warnings, or emergency messages which activate an alarm and get your attention pronto.
Spend the money, I would maybe you can get me one at the right price...let me know ...noswellplease
Is this the paper print out version? Looked into NAVTEX last year and was impressed with the NAV6 series - never gave the paper print out version a first thought. The ICS instruments were all too big for the space I had available. Ended up with a Furuno NX300 with which I'm delighted.
No, even at half price I wouldn't buy it. Why would you want a paper print-out Navtex in 2006? There are loads around which store the info and display it on screens. Personally, I'd go for an ICS Nav6Plus, which will also repeat instrument data through NMEA.
I bought a Nav 4 Plus for my last boat and found it great if I was staying on board for a week or two but not so good for weekends. If it is left on for longer periods it learns to not repeat messages already received. Also, me being ex-MN I used to cut off the Nav Wrngs and paste them in an exercise book, cancelling them as appropriate. It was a useful quick reference tool (plus it reminded me of past times!). Weather forecasts were easy to read and were kept clipped by the chart table. If the unit is only on for a day or two you'll find repeats being printed out and the paper rolls are expensive.
Personal preference whether you want hard copy printout or LCD. I have a 9-year old NAV4 still going strong. One excellent feature of the paper printout is that when the NAV4 is linked to the GPS it will printout your position, speed, direction and time at user-defined intervals (I use 30 minutes). I find this a great feature when single-handing in rough weather when writing a paper log is difficult. While I can see the paper coming out I am re-assured that if all my electrics failed I would have a hard-copy of my recent position.