Assertion: sextant's horizon mirror | /r/HasProperty | desirable
Facets:
Source sentences:
text: Large index and horizon mirrors are desirable because larger mirrors allow more movement of the sextant while taking a sight, and lessen the possibility of losing the image as the body is brought down to the horizon.
text: Large index and horizon mirrors are desirable because larger mirrors admit more light, making it easier to obtain sights in marginal conditions.
text: Large index and horizon mirrors are desirable because larger mirrors admit more light, making it easier to obtain sights in marginal conditions.