In practice, unless otherwise indicated, it is accepted that exitance is taken to be a hemispherical quantity.

It also caused major problems for businesses which relied on the lake and river, including the city's paddleboat operator and the river cruise company.

Then, perhaps, says I, taking the gloves out of my pocket, you can tell me who cleaned this pair of gloves? It's a rum story, I says. "I was dining over at Lambeth, the other day, at a free-and-easy - quite promiscuous - with a public company - when some gentleman, he left these gloves behind him! […]

It's perhaps the nichest of niche markets and one dominated by only five shipwrights: Jongert, Perini Navi, Swan/Navtor, Baltic, and Wally Yachts.