Jim, Measurements are in inches and for the straight and unobstructed top rail which is 1 5/8" in diameter.

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1 Re: NH1210 Thomson Pre Cruise Meeting 1 of 8 9/12/2012 2:30 PM Subject: Re: NH1210 Thomson Pre Cruise Meeting From: Master R/V New Horizon <master@rv newhorizon.ucsd.edu> Date: 9/12/2012 1:58 PM To: Jim Thomson <jthomson@apl.washington.edu> CC: Woody Sutherland <woodys@ucsd.edu>, "Appelgate, Bruce" <bappelgate@ucsd.edu>, "Kelety, Stephen" <skelety@ucsd.edu>, "Engledow, Anja" <aengledow@ucsd.edu>, "techs@cdip.ucsd.edu Techs" <techs@cdip.ucsd.edu>, Elizabeth Brenner <shipsked@ucsd.edu>, "Buck, Eric" <ebuck@ucsd.edu>, "Mauricio, Paul" <pmauricio@ucsd.edu>, <all at sts@sio.ucsd.edu>, Joe Talbert <jtalbert@apl.washington.edu>, Michael Schwendeman <mss28@u.washington.edu>, Alex DeKlerk <adeklerk@apl.washington.edu>, stephanie downey <stephdowney@gmail.com>, Michael Ohmart <ohmart@apl.washington.edu>, Paloma Paul <ppaul@ucsd.edu> Jim, Here is sketch and some photos of the three possible mounting area on the flying bridge. I would suggest the farthest Starboard and aft corner, photo #3. This corner puts you about 8 ft back from the bridge face but the camera could mount on the fore and aft railing furthest to the starboard where the Astrix is. You would be as far outboard as possible and the view would be fairly unobstructed. Photo #1 is of the port corner and photo #2 is of the Starboard forward corner. Measurements are in inches and for the straight and unobstructed top rail which is 1 5/8" in diameter. Please let me know if you need more information or clarification. Ian Captain Ian Lawrence Master, R/V New Horizon master@rv newhorizon.ucsd.edu On 9/12/ :41 PM, Jim Thomson wrote: Ian, Thank you. We have checked the camera geometries and resolutions, and we will plan to proceed with the railing mount above the flying bridge (03 deck). The last thing we need is the railing outer diameter and spacing. We will still plan to mount the sonic anemometer to the jackstaff (using a man bucket at the dock), with no access during the cruise. The camera system has an integrated anemometer, so we will get a bridge measurement too, as you suggest. Liz, I have updated our cruise planning document (attached, v6) for you to post with the other cruise records. Thanks all, Jim

2 Re: NH1210 Thomson Pre Cruise Meeting 2 of 8 9/12/2012 2:30 PM Jim Thomson, PhD Principal Oceanographer Applied Physics Lab University of Washington (office) (cell) On Sep 11, 2012, at 6:03 PM, Master R/V New Horizon wrote: Jim, 34 feet looks like a good average. Obviously the vessels draft will change slightly and the vessel will be pitching and rolling so the height from the water will be constantly changing. Ian Captain Ian Lawrence Master, R/V New Horizon master@rv newhorizon.ucsd.edu On 9/11/2012 5:12 PM, Jim Thomson wrote: Ian, Thanks such a prompt reply and specific input. Understood that we cannot plan for underway access to the mast or the jackstaff. The flying bridge recommendation looks workable; we need to make a few camera calculations/rectifications and make sure we can get the pixel resolution that we need. Towards this, can you confirm that your recommendation is as I've indicated in the annotated drawings (attached), and the mount would be effectively 34 ft height off the water? Thanks, Jim Jim Thomson, PhD Principal Oceanographer Applied Physics Lab University of Washington (office) (cell)

3 Re: NH1210 Thomson Pre Cruise Meeting 3 of 8 9/12/2012 2:30 PM On Sep 11, 2012, at 4:38 PM, Master R/V New Horizon wrote: Jim, I am glad to hear that the pre cruise meeting went well. I have one issue with instrumentation that might need servicing being placed on the main mast, we normally do not allow anyone up the mast unless the vessel is at the pier or the situation is deemed an emergency. Access to the main mast is difficult and frankly dangerous at sea. I would suggest placing you camera on the front railing of the flying bridge. I feel that you would be able to get a clear view of the sea and swell if the camera was angled slightly off of the center line and access to this deck is not a problem. The anemometers could be placed on the flying bridge as well but they should be elevated above the hand rail to avoid any acceleration of wind compressing on the face of the house and accelerating over the railing. I hope this helps in your decision. Ian Lawrence Captain Ian Lawrence Master, R/V New Horizon master@rv newhorizon.ucsd.edu <mailto:master@rv newhorizon.ucsd.edu> On 9/11/2012 4:21 PM, Jim Thomson wrote: Woody: Thanks for the thorough pre cruise call this afternoon. In internal discussion immediately following the call, our team is now looking at the main mast as the preferred location to instal the camera system (rather than the jackstaff). We realized that we could point the cameras on the beam (with the bow to weather) and still observe a clean wave field at low incidence angle. This may be preferable to the jackstaff, because there is more room for mounting at the main mast crow's nest, better opportunity for access/repairs during the cruise, and less sea spray on the lens.

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