Aquabelle,
The 524ST-MSA has a single element that resonates at 50/200khz. That element is used a variety of 600 watt transducers and it's beam width is around 42 degrees (50Khz) and 12 (200Khz). Because it has only one element and wide BW it the starting point for transducers.
Below is a comparison I did years ago with a similar transducer (525ST-MSC). In the screen shot I didn't change any settings, only the transducer.
Snips