[TG] Airmar R109LH/ LM or LHW with Raymarine CP570

[Tom - Raymarine - Moderator]

Hello Michel,

For urgent support, I would always recommend calling us or your Raymarine national distributor. You can get a list of contact points at https://www.raymarine.eu/view/index-id=773.html. Croatia is looked after by Raymarine UK technical support and Raymarine Italia in Milan.

The LHW (and also LWM such as R409) transducers are fantastic if you are looking for pelagic fish (e.g. tuna) in the top 150m or so, but are not good for looking for fish close to the bottom or for bottom structure because the wide beam spreads the power over a large area, and blurs the fine details of fish close to structure and the structure itself.
The LH transducers give the very high level of detail from High Chirp into quite deep water, and are very good at showing the details of fish around bottom structure, but are bad at showing fish in the water column because of the narrow search-light beam.
If you want to do a range of fishing then the LM transducers are a good middle-ground: they have better depth performance and structure detail than LHW, but a wider beam for mid-water fishing than LH, and they still give very crisp detail and clarity: far better than 200kHz non-Chirp and very usable in <10m of water. They have another advantage that fish such as tuna can show up very well at that medium frequency around 80kHz.

I don't know exactly what sort of fishing you're doing in those depths, but it sounds to me as if LM might be the best option for you.

Regards,
Tom