Let’s start with one at Brooklyn GMD, thanks to Mike Abegg, whose previous photos can be seen here. I’d seen NOAAS Hassler before, but I’d never realized she was a catamaran. Might she be NOAA’s only large multi-hull? And the horizontal inboard-pointing fins, I’d not expected those, although they may be standard stabilizers on a cat like this. Her dimensions are 124′ x a broad 61′ x 12′, and you can find more info here. As to location, notice WTC1 in the background. Sharing the graving dock with Hassler is Timothy L. Reinauer.
I caught some shots of Alpine‘s RV Henry Hudson, yesterday in the
welcoming and balmy waters of Brooklyn. Notice the single person standing in the park above?
Many thanks to Mike for sharing the Hassler photo; the Hudson photos were taken by Will Van Dorp as she headed east in the East River in yesterday’s temperate December NYC weather, thermometer as evidence.
An interesting aspect of these two survey/research vessels is the fact that both namesakes are foreign. Hassler, for a time, taught math at West Point.
Seeing these vessels also reminds me of the comparison of NOAA and NASA spending.
For a quite long but fascinating article on the unexplored majority portions of our own planet, click here. I’ve started but will finish reading it tonight.
3 comments
Comments feed for this article
December 20, 2019 at 9:47 pm
Les Sonnenmark
Hassler is not a catamaran, it’s a SWATH–a Small Waterplane Area Twin Hull vessel. The inboard fins are “canards”. A SWATH has little roll, so it doesn’t need the fin stabilizers that are typically on monohulls, and it also has little heave in heavy seas. That makes it a very comfortable, stable platform for a small ship in open waters. But it does need pitch stabilizing and dynamic trim adjustment–that’s what the canards provide. There is a forward set that are primarily for trim adjustment (similar to trimtabs on a monohull) and an aft set that reduce pitching. The aft canards also act as the rudders.
I don’t know if NOAA has other SWATHs, but the US Navy has five larger SWATHs (T-AGOS 19 through 23) performing ocean surveillance (submarine hunting), and there are some SWATH research vessels.
December 20, 2019 at 9:55 pm
tugster
Les- Thx for the correction and the distinction. Now that you mention that, I did post a photo of a SWATH vessel I saw in Philadelphia some years ago: https://tugster.wordpress.com/tag/t-agor-16-uss-hayes/
December 21, 2019 at 10:03 am
Les Sonnenmark
USNS Hayes was a true catamaran, not a SWATH, though it also had some pitching issues so it had a stabilizing hydrofoil added forward.
USNS Victorious (T-AGOS 19) is the first of a class of four Navy SWATH ocean surveillance ships–I directed the design of the vessel’s propulsion and fluid systems for that class, as well for many post-delivery modifications to the larger USNS Impeccable (T-AGOS 23). The Navy also owns the R/V Kilo Moana (T-AGOR 26), a SWATH which is operated by the University of Hawaii as a research vessel.
Wikipedia has a good description of the difference between a SWATH and a catamaran. https://en.wikipedia.org/wiki/Small-waterplane-area_twin_hull