Birding and bridge deck have similar needs and wants. Because a ship is rolling anything over 7-8x gets pretty uncomfortable to use and hold steady. Most favored sizes are 8x42 and 7x50. The 8x42 is smaller and lighter with a wide field. The 7x50 is slightly better under complete darkness conditions. A Bridge deck will always have some lighting so eyes will never be fully dilated to take full advantage of the 7mm exit pupil with a 7x50.
These shoot well above their price point when rated against Nikon and others that cost 3x-5x as much. They are not in Leica/Swarovski ($2500) territory but very nice glass suited to her watch duty. Armored, waterproof, fogproof, fully multicoated and good eye relief all tic a lot of boxes.
https://www.bhphotovideo.com/c/product/917629-REG/celestron_71332_8x42_nature_dx_binocular.html/?ap=y&gclid=EAIaIQobChMIvYqFybuJ3wIVDpl-Ch1FnQ_CEAQYASABEgLIJPD_BwE&lsft=BI%3A514&smp=Y
Move up to ED glass and get a bit sharper views right to the edge. Two times the $$ but another best-in-class that rival much more expensive optics.
https://www.amazon.com/dp/B00YLTG7DA?tag=thewire06-20&linkCode=xm2&ascsubtag=AgEAAAAAAAAAAJz_AAAAAD8R73oAAAAAXAg0Tg