[PSUBS-MAILIST] Forward scanners

[Alec Smyth via Personal_Submersibles]

Yes, and I recall Carsten tried one as well and was also not able to use
it. The only person I heard of who did succeed with the Interphase was
Herve Jaubert.

On Wed, Oct 8, 2014 at 7:35 AM, Alan via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Thanks Alec,
> I had a look at the Interfase scout, & they make comment that .....
> " The unit is not designed to provide forward "bottom" image, but will
> provide a bottom chart mode directly under the boat. Some limitations are
> observed in very shallow ranges."
> That's a bit of a warning that 2 of you haven't had much success.
> Just had a a look at a guy experimenting with a fish finder for forward
> sonar on a ROV.
> He was really having trouble interpreting what was happening with the on
> screen
> representation of a bucket moving toward the transducer in his swimming
> pool.
> ( there are other nuts out there)
> Alan
>
>
>
>
> Sent from my iPad
>
> On 9/10/2014, at 12:00 am, Alec Smyth via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Hi Alan,
>
> I made multiple attempts to use an Interphase Vista, which sounds a lot
> like what you're describing, but was never able to make anything of what I
> saw on the display and ended ecup getting rid of it. Technically I suppose
> it worked, but I could not interpret the images. I know far better ones are
> available now, but if what you're looking at is an Interphase, I would
> suggest it might be worth while going for the next step up price-wise.
>
> Best,
>
> Alec
>
> On Wed, Oct 8, 2014 at 5:55 AM, Alan James via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>> Has anyone had any experience or know anything about forward scanners.
>> I'm reading.....Without moving parts, the ForwardScan transducer is more
>> akin to a conventional sounder that has been tipped on its side. Its
>> effective range is about eight times the actual depth, up to about 160 feet
>> ahead of the boat. It includes a built-in shallow depth alarm with
>> parameters set by the user. In deep water, this is great for detecting
>> rocks and pinnacles. Of course, if you are operating in shallow waters such
>> as the Bahamas or portions of the Chesapeake the eight-to-one ratio begins
>> to work against you.
>> This seems to indicate that if you are cruising 5ft off the bottom or
>> closer in a submarine, you won't get much warning for collision avoidance
>> from the alarm settings These would just pick up on the bottom 5ft below
>> rather than an obstruction coming off the bottom in the distance. Can these
>> be mounted so the angle of the beam runs parralel to the sea bed, pointing
>> more up than down? Or do I leave as is & forget about the alarm function.
>> Am I just as well off buying a fish finder & mounting that forward facing?
>> Regards Alan.
>>
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