- JACK 
- A flag (generally much smaller than the ensign) flown from a staff at the 
  bow of a ship, usually when that ship is berthed, at anchor or moored to a buoy, 
  occasionally when underway but always when dressed overall, and which in current 
  usage may fall into one of the three main categories listed below – a 
  bow flag (see also ‘colonial jack’, 
  ‘distinguishing jack’, 
  ‘dress ship’, 
  ‘jack of honour’, ‘jack staff’, 
  ‘privateer jack’ and 
  ‘union jack’) See supplemental note
   
  Please note that, whilst the origin of this term remains disputed, it is worth recording that “jack”
  was a 17th century English (colloquial) diminutive, and so the smallest flag (generally) displayed by a
  vessel could become the “jack flag”.
  
 
 
- Civil Jack 
- Flown at the bow of a merchant ship (see also ‘civil ensign’ under 
  ‘ensign’).
  
  
  ![[Civil Jack]](../images/v/vxt-d183.gif)  ![[Civil Jack]](../images/v/vxt-d183a.gif)  
 Civil Jack of the Bahamas; Civil Jack of 
  The Netherlands  unofficial
 Please note, however, there is only one country which specifically  prescribes a special jack for 
  general use by civilian vessels – the Bahamas  and one whose law permits such vessels to fly a 
  unique flag in the bows  the UK  
  (see ‘pilot jack’). 
  Sweden, for example, specifies regional flags, whilst the flags of home ports are 
  sometimes officially used and the regulations of some shipping lines call for a house 
  or other flag with this, upon occasion, being expressly permitted under national legislation.
 
  - Government Service Jack 
- Generally, but not exclusively, limited to the UK and former British colonies, 
  and flown at the bow by  civilian-manned Government vessels – but see 
  ‘colonial jack 1)’ with its following note (also 
  ‘government ensign’ under ‘ensign’ 
  and the notes below).
  
  
        
 Jacks of The Royal Fleet Auxiliary (Martin 
  Grieve), The Royal Maritime Auxiliary (Martin 
  Grieve) and Northern Lighthouse Board, UK
 Notes
 a) In UK usage all Government service vessels wearing defaced blue 
  ensigns, including those used by the governing authorities of dependent 
  territories, are legally entitled to fly a blue jack with an 
  appropriate badge in the fly, however, (as far as can be discovered) only the Royal 
  Fleet Auxiliary, the Royal Maritime Auxiliary and the Northern Lighthouse 
  Board actually do 
  so at present.
 b)  In Germany and Austria, Government 
  (as well as civilian) vessels often fly the flag of the relevant state/province, 
  and that in some commonwealth countries the appropriate departmental flag is 
  specified as a jack for government vessels.
 
- Naval Jack 
- Flown at the bow of a warship, often the appropriate national flag (or a variation 
  of it), occasionally the same as the naval ensign, or sometimes a completely different 
  design  the jack (see also ‘masthead pennant 1)’, 
  ‘naval ensign’ under ‘ensign’, 
  ‘jack staff’  and 
  ‘suit of flags’).
  
  
  ![[Russian naval jack]](../images/v/vxt-d187.gif)  ![[Italy naval jack]](../images/v/vxt-d187c.gif)  ![[Dutch naval jack]](../images/v/vxt-d3748.gif) 
 Naval Jacks of Russia,
  Italy and The 
  Netherlands
 
  - JACK OF HONOUR (or HONOR) 
- In French naval usage, a jack originally flown in place of le tricolore by ships that had served in the 
  Free French Navy (the FNFL), and now flown by those ships bearing the same name (see also  ‘cravat 
  1)’ and 
  its following note, ‘fanion 3)’,
  ‘jack’, ‘lanyard 1)’, 
  ‘lanyard pennant’ and ‘tricolour 3)’).
  
    
  ![[Jack of Honour - FNFL Jack]](../images/v/vxt-d188.gif) 
 The FNFL Jack, France
 
  - JACK PIN
- See ‘belaying pin’.
  
    
  ![[Jack pin]](../images/v/vxt-d1343.gif) 
 Jack/Belaying Pins (Wikipedia)
 
  - JACK STAFF (or JACKSTAFF)
- The short staff in the bows of a ship upon which the ‘jack’ is hoisted (see 
  also ‘ensign staff’, ‘jack’
  and ‘staff 1)’). 
  
    
  ![[Jack staff]](../images/v/vxt-d1644.jpg) 
 HMS Iron Duke 19121946, UK (Wiki)
 
  - JACK, THE
- In UK usage and some others, an increasingly obsolete term for the naval jack  see ‘naval jack’ under ‘jack’ 
  and ‘His Majesty’s Jack’.  
  
        
 The Jack/Naval Jack 18791946, Italy; 
  The Jack/Naval Jack, Thailand; 
  The Jack/Naval Jack, Norway
 
  - JAGIELLONIAN
- In East European usage a term often used to describe historic or traditional symbols, and taken from the dynasty 
  which ruled Poland, Lithuania, Hungary, and Bohemia from the 14th century until the 16th century – 
  as examples the Jagiellonian cross or Jagiellonian crown.
  
  
        
 Flag and Arms of Brzozów, Poland;  
  Flag of Łubnice, Poland
 
  - JAGIELLONIAN CROSS
- See cross of Lorraine 
  and jagiellonian.
  
  
     
 Flag and Arms of Wschowa, Poland
 
  - JAMES UNION
- An unofficial name for the 1606 pattern British union flag (see also 
  ‘British flag’, 
  ‘His Majesty's jack’,  
  ‘interlaced’ 
  ‘conjoined’ and 
  ‘union jack’).
  
  
   
 Union Flag 16011801, 
  England/UK
 
 Please note that this term appears to have been a 19th century invention, 
  and that there is no firm evidence of it being used during flag’s lifetime (1606–1801). 
  - JEHOVAH SUN
- The term – and a direct translation of the German Jehova-Sonne – which may be used to describe 
  a sun in splendour, surmounted by a cartouche bearing the name of God in Hebrew lettering  a 
  charge sometimes to be seen on (exclusively Protestant) German military flags of the 16th and 
  17th centuries (see also ‘cartouche’, 
  ‘sun-in-splendour’ and 
  ‘surmounted by’). 
  
  
   
 Flag of an 
  Infantry Company c1675, Electorate of Saxony (Klaus-Michael Schneider)
 
  - JELLOPED (or JOWLAPPED)
- The alternative heraldic terms used to describe the wattles of a domestic fowl when they of a different 
  tincture from its body – jowlapped  but see wattle(d) 2) 
  and comb(ed) (also 
  armed 2), 
  attired,   
  beaked, 
  gorged,
  hardi,
  langued,  
  membered and 
  tincture).
  
  
        
 Flag of Lavey-Morcles, Switzerland; 
  Flag of Šentjernej, Slovenia; 
  Flag of Líšná, Czechia
 
  - JERUSALEM CROSS
- A symbol of the Medieval Kingdom of Jerusalem  in heraldry a cross-potent cantonee  see cross-potent cantonée, 
  plus cross-cantonée and 
  its following note 
  (also cross potent 
  and cross of Jerusalem 1)).
  
    
 Flag of the Kingdom of Jerusalem 11621191
 
  - JIGGLING JONNY
- See ‘tugh 1)’ and its 
  following note.
  
  
  ![[Jingling Jonny]](../images/v/vxt-d283.gif)  
 Source: National Music Museum, used with permission
 
  - JOINANT
- An alternative heraldic term for conjoined  see ‘conjoined’.
  
  
     
 Arms and Flag of Marnardal, Norway
 
  - JOINED (or JOINED TOGETHER)
- In heraldry see ‘conjoined’.
  
  
     
 Arms and Flag of Nærøy, Norway
 
  - JOLLY ROGER 
- 1) Generically, any black (or occasionally red) flag often (but not invariably) bearing white symbols and associated with piracy, 
  but usually shown in its modern form as a flag with black field and stylised white 
  skull above two white crossed bones  a skull and cross-bones (see also 
  ‘privateer ensign’).
- 2) A flag of the latter description given above, but defaced by a number of varying symbols 
  dependent upon the type of action and used unofficially by the submarine service of the British 
  Royal Navy and some others to signify that the boat flying it had successfully engaged an enemy – but see 
  ‘battle flag 3)’ (also ‘deface’).
  
  
  ![[pirate flags - Jolly Roger]](../images/v/vxt-d189.gif)     
 Flag as described above; 
  Flag of Bartholomew Roberts 17th c.; Early 18th c.; 
  Submarine Service, UK
 Notes
 a) With regard to 1), vessels of the US Navy often 
  fly a Jolly Roger at the yardarm during line-crossing ceremonies (as the signal that King Neptune 
  is aboard), however, of all known pirates only Blackbeard is thought to have actually 
  used this design (see also ‘yardarm’).
 b) With regard to 2), it should be emphasised that these symbols were 
  (and are) entirely unofficial, and that a several variations are known.