NavList:

   

Reply

Hi Greg
Yes I'm familiar with the ships  "advance" , etc as posted in the bridge.
Unfortunately I  do not understand your last sentence. ( To me SOA means on
a normal DR plot , the intended speed required...whereas SMG is the actual
speed achieved from point A to B ) Given this I need another few words to
clarify ..."terminology conflicts". please
73
Irv

-----Original Message-----
From: navlist@fer3.com [mailto:navlist@fer3.com] On Behalf
Of Greg Rudzinski
Sent: Friday, October 23, 2009 11:59 AM
To: NavList
Subject: [NavList 10261] Re: SOA vs SMG or SOG


Irv,

Advance refers to the distance a ship moves forward during a 90� turn at a
specified rudder angle. Advance, transfer, and other ships characteristics
are posted on the bridge as per CFRs. Using SOA in place of SMG would lead
to a possible terminology conflict.

Greg

On Oct 20, 6:24�pm, "Irv Haworth"  wrote:
> I'm somewhat perplexed over current usage of abbreviations: to wit the 
> old (last 25 years ?) �standard meaning of SAO (speed of advance) 
> versus what �I believe is the current view as presumably held by WMO 
> (World Metro Org. ) who supply ships with free equipment and training 
> to report weather..VOS (Voluntary Obs ...) What follows is an slightly 
> edited (name of ship etc removed by me) recent report.
> The noon to noon report based on positions shows 425 NM ( my Rhumb calc.
> gives 424.5 NM) which they report as a SAO of 17.7 kts.
> To me the SAO should more rightly be termed the SMG (speed made good) .
> I contacted the webmaster but despite being an old US Navy chap had no
idea.
>
> Hopefully some members might shed some light on matter for someone who 
> may have slipped a notch or two without realizing the new 
> movement....hi..hi himself aka Irvin
>
> Last reported at 2009-Oct-19 12:00 UTC. Time now 2009-Oct-19 18:30 UTC.
> Position
>  .2&lon =-179.7&radius=300> S 17�12', W 179�42'.
>
> Wind from 160 at 14 knots
>
> Waves 1.0 meters (3 feet), 10 second period
>
> Barometer 1012.0 mb
> Air temperature 25.0 � C
> Dewpoint 19.1 � C
>
> Notes � �date/time � � � lat � � lon � � naut. miles run � � � � SOA 
> wind from � � � �knots �barom. � wave height � � air temp � � � �dew 
> point water temp
> � � � � 2009-Oct-19 12:00 � � � �S 17�12' � � � W 179�42' � � �425
> 17.7 � � 160 � �14 � � � 1012.0 �1.0 � � 25.0 � �19.1
> � � � � 2009-Oct-18 12:00 � � � �S 15�00' � � � W 172�42' � � �50
> 16.6 � � 120 � �12 � � � 1010.2 �1.5 � � 26.0 � �21.8




--~--~---------~--~----~------------~-------~--~----~
NavList message boards: www.fer3.com/arc
Or post by email to: NavList@fer3.com
To , email NavList+@fer3.com
-~----------~----~----~----~------~----~------~--~---

   

Reply