Aside from more advanced SONAR technology, the CHIRP+ also offers a number of other technical improvements over its little brother, the Pro+. For example, unlike its predecessor, the CHIRP+ offers a very narrow beam angle of 7° (high CHIRP). Because this beam is more ‘focused’ and targeted, it allows you to see a massive amount of detail at pretty much all depths. However, because of how SONAR works, you are unable to use the high CHIRP frequency in very shallow water less than 1.8m (6ft). The CHIRP+ will automatically switch (if necessary) to the wide beam setting, providing great shallow water accuracy in depths as little as 15cm. In comparison, the Pro+ will not produce an image in depths of less than 50cm (a ‘too shallow’ warning will display on screen).
The CHIRP+ also narrowly beats the Pro+ when mapping deeper water. The narrowest angle beam (high CHIRP) penetrates to depths of 100m compared to the 80m of the Pro+ although it is the better all-round detail CHIRP provides at all depths that will be of most interest to anglers.
Target separation – the echo sounder’s ability to separate one target from another – is much improved in the CHIRP+ model, with a maximum of 1cm compared to 2.5cm in the Pro+. This means identifying different fish in a shoal, picking out a fish lying near the lakebed or mapping out the exact dimensions of an underwater snag is inherently more accurate.
In terms of hardware, although both models are exactly the same size, Deeper have shaved 10g off the newer model (90g vs. 100g). Battery performance is also slightly improved with the CHIRP+ featuring a higher-capacity 950mAh battery over the 850mAh of the Pro+. Both last for around 6 hours on the most conservative settings but the CHIRP+ comes with ‘fast charge’ functionality meaning it can recharge from flat in just over half the time of the Pro+ (75 vs. 120 minutes) and go from zero to 80% charged in just 45 minutes. Obviously, this faster charge time is a big advantage when on the water or when trying to grab a quick fishing trip. Both models charge via standard USB ports.
Although both ‘plus’ models work via internal GPS (American satellites) to help pinpoint your location and aid accurate mapping, the CHIRP+ also works with alternative satellite systems such as GLONASS (Russia), Galileo (EU), BeiDou (China) and QZSS (Japan). This gives your CHIRP+ the chance to work with many more orbital satellites than the PRO+ (GPS only), resulting in better fixes and mapping accuracy, as well as much greater coverage worldwide.
The same accessories for the Pro+ are compatible with the CHIRP+ – a range of high-vis caps, a smartphone mount, a smartphone case and a dedicated flexible arm boat mount to convert your Deeper into a boat-based echo sounder. As with all other Deeper products, the CHIRP+ is operated via the free Deeper app (available for both iOS and Android).